---Alice,whydidn'tyoucomeyesterday?---I______,butIhadanunexpectedvisi

发布时间:2020-08-06 20:51:11

---Alice,why didn't you e yesterday?---I______, but I had an unexpected visitor.A.hadB.wouldC.was going toD.did

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C解析在某些结构,如:beable to,be going to,be about to,oughtto,have to,used to等后作复合谓语的不定式,为了避免重复,常常承前省略不定式后的内容,但要保留不定式符号to。
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