There _______ a lot of trees here, but now it has become desert.

A. is
B. are
C. used to be
D. used to being
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科目:初中英語 來源:月考題 題型:單選題

There _______ a lot of trees here, but now it has become desert.
[     ]
A. is
B. are
C. used to be
D. used to being

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