8.(2010·湖南衡南模拟)We don’t doubt________the people in Beichuan County will recover from the disaster soon and rebuild their homes better than before. A.that
B.if C.what
D.whether 解析: doubt此处用作动词,且句子为否定句,所以用that引导宾语从句;在肯定句中则用whether/if引导宾语从句。 答案: A
9.Some researchers believe that there is no doubt________a cure for AIDS will be found. A.which
B.what C.that
D.whether 解析: There is no doubt that...为固定搭配,意为“……是毫无疑问的”。 答案: C It is OK to leave an electrical appliance on so long as you are using it—if not,turn it off!只要你在使用电器设备,你便可以把它开着,如果不用就把它关掉! (1)so long as=as long as “只要”引导条件状语从句。 ①You may borrow the book as long as/so long as you keep it clean.只要你不把书弄脏,就可以借给你。 ②So long as/As long as you have confidence in yourself,you’ll win.只要你有自信,你会获胜的。 ③You may use the room as you like so long as you clean it up afterwards. 你尽可随意使用这个房间,只要你过后打扫干净即可。
as long as只能用于肯定句,而so long as既可用于肯定句又能用于否定句。 as long as还可意为“与……一样长,长达……”。 ④We need a rope as long as 30 metres. 我们需要一条30米长的绳子。
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