—Where is Jack?I can’t find him anywhere.

—Where is Jack?I can’t find him anywhere.
—He__________ his homework upstairs.
A.might have done B.must have done
C.must be doing D.must do
清鸿2 1年前 已收到1个回答 举报

lhk2020 幼苗

共回答了18个问题采纳率:77.8% 举报

C

must be doing是对目前正在发生的事进行推测。

1年前

7
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