—I’m afraid you missed a fantastic lecture yesterday. How come you were absent from it?
—If you _______ know, I asked for a day off and visited a relative of mine in hospital.

A．mightB．mayC．shallD．must

D

解析試題分析：句意：--恐怕你昨天錯(cuò)過了極好的講座。你怎么會(huì)缺席的？--如果你偏要知道，我請(qǐng)了一天假去看完醫(yī)院的親戚。Must必須，偏要，may可以，可能，shall應(yīng)該，將會(huì)，所以選D。
考點(diǎn)：考查情態(tài)動(dòng)詞

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