.— Why does Michael know so much about Angkor Watt?
— He ________ have been there, or...
A.must | B.oughtn’t to | C.may | D.can’t |
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.— Why does Michael know so much about Angkor Watt?
— He ________ have been there, or...
A.must | B.oughtn’t to | C.may | D.can’t |