—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure. A. can; must ...
2022-11-03 10:08:17 206次 2014-2015学年广东汕头南澳中学高一下期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A. can; must B. can; may
C. must; can D. may; must
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