单选题
Jack ______ out very early, for he had not shown up at breakfast.
A、
could have gone
B、
must have gone
C、
ought to have gone
D、
should have gone
【正确答案】
B
【答案解析】
考查“情态动词+完成式”的用法。根据句意应选B，因为must have done表示对过去事情的肯定推测。C和D中should/ought to have done都表示本应该做某事却没有做；A中could have done表示本可以做某事却没有做，均不符合题意。
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