5．I can't tell where Mary is，but shemay/might have gone （可能去了） to meet her classmates，for they want to go to Yunnan to work as volunteers．（go）

分析 雖然我也說不清瑪麗在哪兒，但她有可能去見她的同學(xué)了，因?yàn)樗麄兿胱鳛橹驹刚叩皆颇先スぷ鳎?/p>

解答 答案：may/might have gone
根據(jù)"I can't tell where Mary is"使用了一般現(xiàn)在時(shí)可知，瑪麗現(xiàn)在不在這里了，故可推測出她是在此之前就離開了，因此此處表示過去發(fā)生的動作；結(jié)合句意以及給出的漢語部分可知，此處表示的應(yīng)是對過去事情的推測，但事情發(fā)生的可能性較�。还蚀鸢笧椋簃ay/might have gone

點(diǎn)評 本題考查了情態(tài)動詞表示推測的用法；首先應(yīng)根據(jù)句中的時(shí)態(tài)判斷出此處表示的是對過去事情的推測；然后結(jié)合句意判斷出事情發(fā)生的可能性的大小，從而確定出應(yīng)使用的情態(tài)動詞．

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