Who is it up ______ decide whether to go or not? (为什么不选
Who is it up ______ decide whether to go or not? (为什么不选B,选A?)
A.to to B.to
2. We saw the bird flap its wings and ______ away. (为什么不选C,选A)
A.fly B.flied C.flew D.flying
3. _______ ,ice will be changed into water. (为什么不选A,选B)
A.Heating B.Heated
4.Don't leave me _______ alone at home.(为什么选A,不选B)
A.stay B. staying
5.The young man told the doctor that he didn' t need ______ his heart _____ . (为什么不选A,选B)
A.having ,checked B.to have ,checked
6.Try ______ the back door if nobody answers the front door.
A.to knock at B.knocking at
7.________ many times ,but he made the same mistake again.(为什么不选A,选B)
A.Having been told B.He had been told
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共回答了18个问题采纳率：88.9% 举报
1 up to固定搭配 to decide不定式infinitive,A
2 see sb.do sth 看见某人（做完）某事,不是see sb.did/done sth.（see sb.doing sth 看见某人正在做某事） A
3 passive 被动.冰被加热后变成水（主语是冰）B
4 leave sb.do sth固定搭配 A
5 need to do sth.固定搭配 have sth.done passive被动 B
6 A try to do sth.固定搭配 A
7 past perfect 过去完成时,having been told 是现在完成.B
2 see sb.do sth 看见某人（做完）某事,不是see sb.did/done sth.（see sb.doing sth 看见某人正在做某事） A
3 passive 被动.冰被加热后变成水（主语是冰）B
4 leave sb.do sth固定搭配 A
5 need to do sth.固定搭配 have sth.done passive被动 B
6 A try to do sth.固定搭配 A
7 past perfect 过去完成时,having been told 是现在完成.B
1年前
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