第1个回答 2017-12-21
55.Did Dr. Huang go on working throughout the night?
56.The children have never seen so much snow before, have they?
57.Why did they go to the supermarket?
58.The girl is so young that she can't go on a trip alone.
59.She is smart enough to pass the exam.
56.The children have never seen so much snow before, have they?
57.Why did they go to the supermarket?
58.The girl is so young that she can't go on a trip alone.
59.She is smart enough to pass the exam.
第2个回答 2017-12-21
55.Did go
56.have they
57.Why did
58.The girl is so young that she can't go on a trip alone.
59.She is smart enough to pass the exam.
供参考本回答被提问者采纳
56.have they
57.Why did
58.The girl is so young that she can't go on a trip alone.
59.She is smart enough to pass the exam.
供参考本回答被提问者采纳
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