2. 外语
  3. It isn’t cold enough for there______a frost tonight, so I can leave Jim’s car out quite safely.

It isn’t cold enough for there______a frost tonight, so I can leave Jim’s car out quite safely.

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问题 It isn’t cold enough for there______a frost tonight, so I can leave Jim’s car out quite safely.
选项 A、would be
B、to be
C、was
D、being
答案B
解析 for引导带逻辑主语的不定式for sb．to do sth．，本句中的there作形式主语，不定式就是to be a frost。如：“该吃药了”应说：It’s time to take the medicine．如果要说“他在等到该吃药的时间再吃药”就应说：He’s waiting for it to be time to take the medicine．
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