单项选择题

A．It has been increasing since the Ice Age.
B．It affected the growth of trees.
C．It is determinated by the chemicals in the air.
D．It follows a certain cycle.
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单项选择题
A．This apple pie tastes very good.B．His mother likes the pie very much.C．This pie can’t match his mother’sD．His mother can’t make apple pies.
A．This apple pie tastes very good.
B．His mother likes the pie very much.
C．This pie can’t match his mother’s
D．His mother can’t make apple pies.
单项选择题
A．She’s not sure if the computer is fixed.B．She has to post a letter instead.C．She can’t send the message right nowD．She has to mm down the man’s request.
A．She’s not sure if the computer is fixed.
B．She has to post a letter instead.
C．She can’t send the message right now
D．She has to mm down the man’s request.
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