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11．It's no good______ to come now．He is busy．（　�。�

	A．	if you ask him		B．	asking him
	C．	to ask him		D．	that you ask him

分析現在要他來沒有用．他忙．

解答答案是B．本題考查動名詞做主語．該題中考查了固定句型"It's no good doing sth（做…是沒有用的）"，其中it是形式主語，doing是真正的主語，所以答案是B；

點評首先判斷選項中的動詞在句中是以謂語還是非謂語形式出現，然后根據選項在句中的功能結合非謂語的基本用法做出合理的判斷．

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