14.According to aviation regulations,no passenger      carry cigarette lighters or knives on board.( 。
A.willB.shallC.needD.must

分析 根據(jù)航空條例,任何乘客不得攜帶打火機(jī)或刀具登機(jī).

解答 答案:B 
A.will 用于肯定句中,表示意愿,決心等,"愿意"; B.shall用在陳述句中,主要用于第二、三人稱,表示說話者的允諾、告誡、威脅、命令、規(guī)定、必然性等,;C.need 作情態(tài)動詞用時,常用于疑問句、否定句中,"需要";D.must"必須";根據(jù)句中提到的"aviation regulations航空條例"可知,"no passenger      carry cigarette lighters or knives on board"表示規(guī)定性的內(nèi)容,故選B.

點評 本題考查了情態(tài)動詞的用法.要注意總結(jié)每個情態(tài)動詞的意義及用法,然后結(jié)合句意,選出正確地答案.

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