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

A. is
B. are
C. used to be
D. used to being
C
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科目：初中英語(yǔ) 來(lái)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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