题目内容
The son thanked his mother _________ helping him __________ his lessons and he gave his mother a kiss.
A.for…with B.with…in C.of…about D.on…at
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题目内容
The son thanked his mother _________ helping him __________ his lessons and he gave his mother a kiss.
A.for…with B.with…in C.of…about D.on…at