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19．A new law which bans teenagers from somking will___90 days after the governor signs it．（　　）

	A．	come to power		B．	come into effect
	C．	make an effort		D．	make a difference

分析一項禁止青少年吸煙的新法案將在首長簽字九十天后生效．

解答答案：B．
come into effect生效；come to power掌權；make an effect影響；make a difference有意義；句中after連接的時間狀語從句表示動作未發生，根據句意應該是九十天后生效的意思．故選B．

點評動詞辨析是常考題，主要考查學生的詞匯量．學習時，要注意積累，特別是相似或相近的單詞，要注意區分和掌握．

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