15．是什么事使他不能參加我們的會議仍然是個(gè)謎．（prevent…from）What prevented him from attending our meeting is still a mystery．．

分析 What prevented him from attending our meeting is still a mystery．

解答 What prevented him from attending our meeting is still a mystery．
本句中"什么事"做了主語，因此要用what引導(dǎo)的主語從句，做still a mystery的主語，從句可譯為What prevented him from attending our meeting，仍然是個(gè)謎，is still a mystery； prevent…from，阻止某人做某事．

點(diǎn)評 本題主要考察主語從句的應(yīng)用，雖然沒有提示但是考生由漢語結(jié)構(gòu)也要意識到．熟練使用多種從句也會使表達(dá)加分．

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