题目内容
The policemen are very glad ________ the old people if they have any trouble(麻烦).
[ ]
A.help
B.to help
C.helping
D.helps
答案:B
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题目内容
The policemen are very glad ________ the old people if they have any trouble(麻烦).
A.help
B.to help
C.helping
D.helps