单选题
It isn't cold enough for there ______ a frost tonight, so I can leave Jim's car out quite safely. A. would be B. to be C. was D. being
【正确答案】
B
【答案解析】[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．