________alotoftreesinthisarea,butnowwecanseeatallbuildi...
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問題詳情:
________ a lot of trees in this area, but now we can see a tall building instead.
A. There used to have B. There used to be
C. There is used to having D. There is used to being
【回答】
B
知識點:動詞時態
題型:選擇題
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