19．A new law which bans teenagers from somking will___90 days after the governor signs it．（　�。�
A．come to powerB．come into effect
C．make an effortD．make a difference

分析 一項(xiàng)禁止青少年吸煙的新法案將在首長(zhǎng)簽字九十天后生效．

解答 答案：B．
come into effect生效；come to power掌權(quán)；make an effect影響；make a difference有意義；句中after連接的時(shí)間狀語(yǔ)從句表示動(dòng)作未發(fā)生，根據(jù)句意應(yīng)該是九十天后生效的意思．故選B．

點(diǎn)評(píng) 動(dòng)詞辨析是常考題，主要考查學(xué)生的詞匯量．學(xué)習(xí)時(shí)，要注意積累，特別是相似或相近的單詞，要注意區(qū)分和掌握．

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