2019屆高考英語(yǔ)Unit 4 Global warming精講精練復(fù)習(xí)
c.have effects on d.keep away from
【答案】 a
there is no doubt that the earth is becoming warmer (see graph 1) and that it is human activity that has caused this global warming rather than a random but natural phenomenon.毫無(wú)疑問，地球正變得更加暖和(見圖表1)，而且全球轉(zhuǎn)暖是人為的，而不是隨意的自然現(xiàn)象。
在本句型中，that從句是同位語(yǔ)從句，表示doubt的內(nèi)容。用法與there is a chance that...是一樣的。
(1)doubt作為名詞，若用在否定句或疑問句中，后面接that引導(dǎo)的同位語(yǔ)從句；若用在肯定句中，后面接whether引導(dǎo)的同位語(yǔ)從句。注意此時(shí)不可以用if替換whether。
(2)doubt作為動(dòng)詞，若用于否定句和疑問句中，后面接that引導(dǎo)的賓語(yǔ)從句；若用于肯定句中，后面一般接whether或if引導(dǎo)的賓語(yǔ)從句 。
①there is no doubt that they will agree with you on this matter.
毫無(wú)疑問，他們?cè)谶@件事上會(huì)同意你的。
②there is no doubt that radio and television are important means of communication.
毫無(wú)疑問，收音機(jī)和電視機(jī)是信息交流的重要方式。
③i have no doubt that he will succeed.我相信他會(huì)成功的。
there’s some doubt whether/if he is fit for the job.
他是否勝任這項(xiàng)工作有點(diǎn)疑問。
④he doubts if she will keep her word.
他不敢肯定她是否會(huì)遵守諾言。
⑤i don’t doubt/have no doubt that he will win the race.
我不懷疑他將贏得比賽。
8.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...為固定搭配，意為“……是毫無(wú)疑問的”。
【答案】 c
it is ok to leave an electrical appliance on so long as you are using it—if not，turn it off！只要你在使用電器設(shè)備，你便可以把它開著，如果不用就把它關(guān)掉！
(1)so long as＝as long as “只要”引導(dǎo)條件狀語(yǔ)從句。
you may borrow the book as long as/so long as you keep it clean.只要你不把書弄臟，就可以借給你。
so long as/as long as you have confidence in yourself，you’ll win.只要你有自信，你會(huì)獲勝的。
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還可意為“與……一樣長(zhǎng)，長(zhǎng)達(dá)……”。
we need a rope as long as 30 metres.
我們需要一條30米長(zhǎng)的繩子。
9.(XX年北京卷)you may use the room as you like________you clean it up afterwards.
a.so far as b.so long as
c.in case d.even if
【解析】 句意為：你盡可隨意使用這個(gè)房間，只要你過后打掃干凈即可。so far as遠(yuǎn)到；就……而言；so long as只要；in case以防(萬(wàn)一)；even if即使。
【答案】 b
10.(XX年全國(guó)卷ⅰ)—have you got any idea for the summer vacation?
—i don’t mind where we go________there’s sun，sea and beach.
a.as if b.as long as
c.now that d.in order that