1.Mrs Smith didn't come last night,did she?No,we ——for her.A

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1.Mrs Smith didn't come last night,did she?No,we ——for her.A whole night was wasted.A.couldn't have waited B.mustn't have waited C.didn't need to wait D.needn't have waited
我想选C,为什么不行呢?
2.Every summer,the beautiful town welcomes top buskers,or street performers,____they're called ,from all over the world.A.as B.that C.which D.what 为什么C不可以呢?

needn't have done的意思是“本不需做而做了某事”,是一个固定搭配

as引导状语状语从句,修饰top buskers,or street performers整个句子,而which在这种情况只能做定语从句,而且只能修饰street performers

1.Mrs Smith didn't come last night,did she?No,we ——for her.A She her homework last night.a.did no _____（be）ill,Mrs Smith didn‘t attend the party last night. She didn't her homework last night 哪里错了? Tina didn't go home last night .She ______at her aunt's.A is 1..—You didn’t come by bus,did you?— .I came a taxi.A.No,by she didn't come to school,did she__she had a bad cold for a 英语选择题was it——it snowed last night——he didn't come?A,because； 25.——Why didn’t you come to Simon’s party last night? —She didn’t come to school yesterday,did she —________.thoug Jack didn't come to our meeting last time,did he? No,he_____ ---I didn't hear you come in last night.---That's good.We tr