Because blood from different individuals may different in the type of antigen on the surface of the red cells and the type of antibody in the plasma, a dangerous reaction can occur between the donor and recipient in a blood transfusion.

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• How much times did Rich and Jennifer have to do the experiment?

• When a lion gets hungry, its manner changes and it becomes threatened.

• People are not allowed enter the park after midnight because of lack of security.

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• Mrs. Stevens, along with her cousins from New Mexico, are planning to attend the festivities.

• Although most species of small birds gather in groups at feeders provided by bird-watchers, the bright red cardinals usually appears alone or with its mate.

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• Mrs. Alien was concerned about me having to drive so far every day.

• More than ten students have failed the exam, that surprised the class teacher.

• Tom said that he was trying to carry out some campaigns to protect environment and will encourage others to do so.

• Despite America’s affluence, many people are without jobs, on welfare, and have a lot of debts.

• It was not until the end of prehistoric times that the first wheeled vehicles appearing

• Excavations in some villages on the east bank(A) of the Euphrates River have revealed(B) an ancient community that had been laying (C) under later (D) reconstructions of the city of Babylon.

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• For thousands of years, man has created sweet-smelling substances from wood, herbs and flowers and using them for perfumes or medicine.

• The chemistry instructor explained the experiment in such of a way that it was easily understood.

• A child of noble birth, his name was famous among the children in that school.

• Because her sickness she didn’t take part in the English competition held in Sunday.

• If the goal keeper had playing better, they would not have lost the game.

• When a patient's blood pressure is much higher than it should be, a doctor usually insists that he will not smoke.

• The Oxford English Dictionary is well known for including many different meanings of words and to give real examples.