—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure. A. can; must ...
2022-11-24 03:26:13 182次 2016届河北省高一下学期一调考试英语试卷（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
本题链接：
