单项选择题

David is goodEnglish, but he doesnt do wellPE.

A．at; on
B．at; in
C．at; with
D．in; at
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单项选择题
.So far we have done a lot to build a lowcarbon economy,but it is ideal.We have to work still harder.
A． next to
B．far from
C．out of
D．due to
单项选择题
—I haven’t got the reference book yet,but I’ll have a test on the subject next month.—Don’t worry.Youhave it by Friday.
A．could
B．shall
C．must
D．may
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