问题描述：
1.He raised his hat ___ his head in order to let me find him in the crowed.
A.on B.over C.above D.behind ( B.C 哪一个呢?好难区分哦）
2.I hear someone ___ at the door .Please go and see who ___ is.
A.knock,it B.knocking it
C.knocking,he D.knock,he
(knock 还是 knocking)
A.on B.over C.above D.behind ( B.C 哪一个呢?好难区分哦）
2.I hear someone ___ at the door .Please go and see who ___ is.
A.knock,it B.knocking it
C.knocking,he D.knock,he
(knock 还是 knocking)
问题解答：
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