Mountain climbing ______ be really dangerous at times even though it is challenging and exciting in general.

A. canB. shouldC. shallD. must

 

A

【解析】

試題分析：在平時(shí)的學(xué)習(xí)中既要注意情態(tài)動(dòng)詞的基本含義，也要注意情態(tài)動(dòng)詞的特殊意義，如must偏偏，非得；should竟然；mustn’t禁止，千萬不能；等等。情態(tài)動(dòng)詞Shall用于所有人稱，表示命令，警告，允諾；以及法律規(guī)定中要做的事情。情態(tài)動(dòng)詞can能夠，可能；should應(yīng)該；shall將要；must一定，必須；本句考察的是情態(tài)動(dòng)詞can的一個(gè)特殊用法“有時(shí)候會(huì)…”；句義：即使登山總的說來很有挑戰(zhàn)性也很讓人興奮，但是有時(shí)候它也很危險(xiǎn)。故A正確。

考點(diǎn)：考察情態(tài)動(dòng)詞用法

 

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