【正文】
是什么?——媽媽,他們更小、更輕,為的是方便攜帶。so that“為的是,以便”,表示目的;unless“除非”;if“如果”;until“直到”。由句意可知選D。24. Tom failed in the exam ag ain ______ he tried his best.A.if B.unless C.though D.because【答案】C【解析】試題分析:句意:盡管他盡了最大努力,湯姆在考試中又不及格。if是否,如果;unless除非,如果不;though雖然,盡管;because因?yàn)?。故選C?!究键c(diǎn)定位】考查連詞辨析25.___________ I do, I do it for you. Do not ever doubt that, my boy.A.Whatever B.Wherever C.Whenever D.Whoever【答案】A【解析】【詳解】句意:不管我做什么,我都是為你做的。別懷疑,孩子。Whatever無論什么;B. Wherever無論在哪里;C. Whenever無論何時(shí);D. Whoever無論誰。分析句子___________ I do, I do it for you. 的結(jié)構(gòu)可知,本題缺少的是賓語,也就是do的賓語,能充當(dāng)賓語的是選項(xiàng)A/D,故排除B/C;Whoever無論誰,指人,做do的賓語不合適,排除。whatever 是連詞,引導(dǎo)讓步狀語從句。從句意上說是在從句中做do的賓語。語境是:不管我做什么,我都是為你做的。故選A。26.They will lose the game _______ they try their best.A.unless B.once C.since D.a(chǎn)fter【答案】A【解析】【詳解】試題分析:句意:他們會(huì)輸?shù)舯荣惖?,除非他們盡自己最大的努力。lose the game 輸?shù)舯荣?,try one’s best 盡最大的努力。 A. unless 除非; B. once 一次;C. since 因?yàn)椋?D. after 在…之后,根據(jù)題意可知此句是unless引導(dǎo)的條件狀語從句,故選A。27.Our head teacher often says, "You will not pass the exam ___________ you work hard."A.if B.unless C.since D.when【答案】B【解析】句意:我們的班主任常說:如果你們不努力學(xué)習(xí),你們就通不過考試。If如果,引導(dǎo)條件狀語從句;unless除非,引導(dǎo)條件狀語從句;since自從,因?yàn)?,引?dǎo)時(shí)間狀語從句;when當(dāng)……時(shí)候,引導(dǎo)時(shí)間狀語從句;條件狀語從句用一般現(xiàn)在時(shí)表示一般將來時(shí),主句用一般將來時(shí),根據(jù)題中的時(shí)態(tài)和句意,如果不努力,就通不過考試,故此處用unless。故選B。28.I’ll go to visit my aunt in England _______ the summer holiday starts.A.while B.since C.until D.a(chǎn)s soon as【答案】D【解析】【詳解】句意:暑假一開始,我就要去看望我在英國(guó)的姑姑。考查連詞辨析。A.while正當(dāng)……的時(shí)候;B.since因?yàn)?;C.until 直到;D.a(chǎn)s soon as一……就……。此處是時(shí)間狀語從句, 據(jù)題意,故選D。29.Henry will give us a report as soon as he _______.A.a(chǎn)rrives B.a(chǎn)rrived C.is arriving D.will arrive【答案】A【解析】【詳解】句意:亨利一到,他就要給我們做一個(gè)報(bào)告。當(dāng)主句描述將來動(dòng)作時(shí),英語條件狀語從句中用一般現(xiàn)在時(shí)態(tài)表示將來的動(dòng)作;主語單三,謂語動(dòng)詞用單數(shù)形式;故選A。30.In summer, food will go bad quickly ________ we put it into a fridge.A.if B.unless C.a(chǎn)s soon as D.while【答案】B【解析】【詳解】句意:夏天,除非我們把食物放進(jìn)冰箱里,否則食物很快就會(huì)變壞。A. if如果;B. unless除非;C. as soon as一……就;D. while正當(dāng)……的時(shí)候。根據(jù)生活常識(shí),在夏天只有放在冰箱里的食物才能保證不變質(zhì),unless除非,如果不,相當(dāng)于if not,引導(dǎo)條件狀語從句,故答案為B。