Common Errors in English Test: Than Then

Since then^, more than five-thousand-three-hundred-people have walked all of the Appalachian Trail.| Union Carbide then^ threatened to suspend more than six-hundred workers.| Until then^, General Electric released more than four-hundred-thousand kilograms of the chemicals into the river.| Since then^, it has made more than one-hundred-fifty recordings.| Then they put the virus into more than^ two-hundred eggs from rhesus monkeys.| In the forty years since then^, more than one-hundred-sixty-thousand Americans have served as Peace Corps volunteers.| Since then^, more than two-hundred-fifty cases of the disease have been reported in Britain.| Then the man bought a copy of a map of the area printed more than^ one-hundred years ago.| The scientists then^ forced the embryonic stem cells to develop into several kinds of cells found in the organ called the pancreas.| The cells then^ formed structures very similar to the pancreatic structures that produce insulin.| The researchers then^ removed the genetic material from a mouse egg.| then^ he and his second wife moved to Ghana in west Africa.| Back then^, the holiday was called Decoration Day.| The scientists then^ forced these embryonic stem cells to develop into several kinds of cells found in the organ called the pancreas.| The cells then^ formed structures very similar to the pancreatic structures that produce insulin.| The researchers then^ removed the genetic material from a mouse egg.| then^ it hid the dead deer under water.| Since then^, John Grisham has written one book a year.| then^ they edit each other's work.| But then^ Sarah Ferguson tells the little girl that she should learn about investing her money.| then^ you cut and collect some grass.| then^ you build a box from the four pieces of wood.| then^ fill it with the cut grass.| then^ put the bag in a big container of water.| then^ they reproduce again.| then^, the discovery of the insect poison D-D-T led to efforts to try to end the disease completely.| It probably killed all of the huge reptiles called dinosaurs that then^ ruled the Earth.| then^ they go back to their villages to provide health care and to teach others what they have learned.| then^ the bride and groom will kiss.| then^ he heard about Marshall Strome of the Cleveland Clinic.| Clinic doctors then^ searched for six months for the right larynx for the transplant operation.| then^ special tools will help the scientists identify the chemicals found in the sun.| Human waste is treated by the microbes and then^ used to help new plants grow.| The players watched the spinners move in circles for six seconds and then^ land in one of the areas.| then^ it will move to the Kennedy Library in Boston, Massachusetts.| then^ the visitor sees clothes from the White House years.| then^ they will keep all the investors' money.| The Columbia River was at the center of the new American settlement in Pacific Northwestern territory, then^ known as the Oregon Territory.| Before then^, about twenty-five-thousand salmon swam up the Columbia River into Canada to lay their eggs.| then^ the yellow part of eggs is added and the mixture is dried in the sun.| The mixture then^ is put into small vitamin capsules that can be swallowed.| then^ they compared these damaged hearts with those of ten patients with normal hearts who had died of other causes.| then^ it would be reprocessed into fuel.| Doctors then^ would place genetic material from the woman's husband into the egg before putting it in the woman's uterus.| The Iraqis have been using the radar near Baghdad to find American and British planes, then^ fire missiles at them from the south.| Until then^, we leave you with the Glenn Miller Orchestra playing "String of Pearls".| then^ many more people will be able to enjoy "The Eyes of History."| These agreements then^ go to the governments of each country for approval or rejection.| then^ the golfer must be able to hit the ball carefully for a short distance to get it into the hole.| However, the experts say people should not have more than^ two-thousand milligrams of vitamin C in foods and pills each day.| They say people should take no more than^ one-thousand milligrams of vitamin E in pill form each day.| The experts say people should not have more than^ four-hundred micrograms of selenium a day.| Scientists estimate that the waves caused by a possible underwater landslide could be more than^ six meters high.| And, the waves can be more than^ thirty meters high as they move toward land.| Two years ago, more than^ two-thousand people died when a tsunami struck Papua New Guinea.| At that time, there were more than^ three-million cases around the world each year.| Now, there are fewer than^ one-hundred-thousand cases of the disease.| The Bill and Melinda Gates Foundation gave the coalition more than^ twenty-eight-million dollars.| Every year, more than^ one-million people from all over the world visit a huge animal park in the western state of California.| More than^ two-thousand animals live there as they do in the wild.| This area is home to more than^ four-hundred kinds of animals and thousands of plants and trees.| Some of them are more than^ thirty meters high.| The area cost more than^ three million dollars to build.| He said these harmful actions have already killed more than^ twenty-five percent of the world's reefs.| More than^ four-hundred-thirty people have died in violence in the West Bank and Gaza in the past six months.| On Tuesday, Microsoft shares lost more than^ fourteen-percent of their value.| They will plan action to fight a disease that affects the African continent more than^ any other.| Malaria kills more than^ one-million people each year.| The World Health Organization says malaria attacks poor people more than^ any other disease.| However, more than^ ninety percent of malaria cases are in African countries south of the Sahara Desert.| Some harmful insects are more easily treated with biological controls than^ with chemical ones.| It is estimated that more than^ one-million people around the world suffer from multiple sclerosis, which also is called MS.| More than^ half of MS patients have this form at any one time.| The Icelandic sagas say Leif and his crew then^ sailed south for about two days and saw more land.| Leif then^ decided to return to Greenland.| Back then^, the holiday was called Decoration Day.| Officials noted then^ that drought conditions are a threat to individuals, agriculture and industry.| In the twenty years since then^, small explosions, many small earthquakes and other volcanic events have been recorded at Mount Saint Helens.| The water is then^ infected and the disease continues.