单项选择题

A．They have difficulty identifying these ceils.
B．They’ve learned how to reproduce these cells.
C．They aren’t sure how these cells work.
D．They’ve found similar cells in other species.
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单项选择题
A．Because she was a black girl.B．Because she got the highest average in the class.C．Because she wanted to hit the chairman’s wife.D．Because she refused to retake the exam.
A．Because she was a black girl.
B．Because she got the highest average in the class.
C．Because she wanted to hit the chairman’s wife.
D．Because she refused to retake the exam.
单项选择题
A．To see films.B．To attend lectures.C．To read books in the library.D．To visit the Association.
A．To see films.
B．To attend lectures.
C．To read books in the library.
D．To visit the Association.
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