题目内容

Mellisa ______ sing at Christmas party.


  1. A.
    was heard
  2. B.
    was heard to
  3. C.
    heard to
  4. D.
    was hearing
B
Mellisa 被听到在圣诞晚会上唱歌。hear sb. do sth. 为省略 to 的不定式结构,在变为被动语态时省略的 to 要还原,故用B。
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