题目内容

-----These tomatoes are huge ! You must have watered them a lot .
-----Yes,  I___. They ought to be piped enough to pick by next Friday
A. doB.mustC. haveD.did
D
根据前面问句must have watered,表示对过去事情的肯定推测,并结合后面肯定和的答语,这是肯定的回答。
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