1．No one knows when such a custom first _____．（　　）
A．came into powerB．came into beingC．came trueD．came out

分析 沒有人知道這樣的習(xí)俗最初是怎樣形成的．

解答 答案B．
came into power掌權(quán)，上臺；came into being 形成；came true 實現(xiàn)；came out出來，出版．根據(jù)賓語從句的主語"such a custom"可知句子表達的意思是"沒有人知道這樣的習(xí)俗最初是怎樣形成的．"，故答案選B．

點評 本題考查動詞短語的辨析．英語中有的詞組沒有捷徑，只有平時加強記憶，要注意區(qū)別，記憶的時候不能忽視，這是常見的命題方式．平時要加強記憶，做題時，別忘了要結(jié)合上下文句意判斷．

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