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……的時候,though盡管,.until直到,because因為。根據(jù)I didn’t need to,我沒必要打,可知不打電話是有原因的,故選D考點:考查連詞。20.We don’t know the love of our parents ____________ we bee parents ourselves one day.A.before B.until C.when D.a(chǎn)fter【答案】B【解析】【詳解】句意:直到有一天我們自己成為父母,我們才知道父母的愛??疾檫B詞辨析。before在……以前;until直到,和not連用表示“直到……才”;when當……的時候;after在……以后。本句是“not …until”結構;根據(jù)句意結構和語境,可知選B。21.Can students go online during lessons?They can’t ________ it is for that lesson.A.if B.unless C.until D.while【答案】B【解析】【詳解】句意:——學生上課時能上網(wǎng)嗎?他們不可以,除非為了上那堂課。本題考查連詞辨析,;;;……時候。答語是條件狀語從句,根據(jù)句意結構可知,需要unless連接,故選B。22.Have you improved your spoken English?Not yet.I39。ll try my best______I am not good at it now.A.so B.a(chǎn)lthough C.but D.until【答案】B【解析】【詳解】句意:——你提高你的英語口語了嗎?——還沒有.雖然我現(xiàn)在還不擅長,但是我會盡力的.考查連詞辨析。A. so所以;B. although 雖然;C. but但是;D. until直到。根據(jù)語境推測句意是——你提高你的英語口語了嗎?——還沒有.雖然我現(xiàn)在還不擅長,但是我會盡力的.在這里兩個句子之間存在一個相反的讓步關系,though/although/even though“雖然;盡管”,引導讓步狀語從句,故選B.【點睛】本題主要考查連詞的用法,連詞在句子中主要起聯(lián)系上下文的作用,他們之間的區(qū)別就是表示邏輯關系的不同,所以在解題時先要理解上下文含義,然后根據(jù)上下文邏輯關系選擇合適的連詞.前后句之間是讓步關系.23.I have to leave now __ I can catch the last bus.A.so that B.because of C.until D.a(chǎn)s soon as【答案】A【解析】試題分析:so that以便,所以;because of因為,由于;until直到;as soon as一……就……。句意:為了趕上末班車,我現(xiàn)在必須離開了。結合語境可知選A??键c:連詞辨析點評:連詞在句子中主要起聯(lián)系上下文的作用,他們之間的區(qū)別就是表示邏輯關系的不同,所以在解題時先要理解上下文含義,然后根據(jù)上下文邏輯關系選擇合適的連詞。連詞的用法都比較多,語義之間還有交叉,熟記其基本應用規(guī)則,了解其區(qū)別,注意固定搭配對象,是做好此類題型的關鍵。24._______riding shared bikes is an easy way to travel, it also causes some problems.A.Although B.If C.Until【答案】A【解析】【詳解】句意:雖然騎共享單車是一種簡單的旅行方式,但也會引起一些問題。A. Although盡管,雖然;B. If如果;C. Until直到。根據(jù)下文it also causes some 。根據(jù)題意,故選A。25.Today, many people are in subhealth(亞健康), why?Yes. They are so tired long time ________ they are busy with their work and exercise little every day.A.because B.until C.though D.or【答案】A【解析】【詳解】句意:——今天,許多人處于亞健康狀態(tài),為什么?——是的。他們長時間很累,因為他們忙于工作,每天很少鍛煉??疾檫B詞辨析。because因為,表原因;until直到,表時間;though盡管,表讓步;or或者,表轉折。本句是原因狀語從句,前果后因;根據(jù)句意結構和語境,可知選A。26.Chen Wei isn’t at school today ________ he is taking a robot petition in Shanghai.A.so B.because C.before D.if【答案】B【解析】試題分析:句意:陳煒今天不在學校因為他在上海參加機器人競賽。so所以;because因為;before在……之前;if如果。所以選B??键c:考查連詞。27.—Did you catch the early bus this morning? —Yes. The bus started to move _ I got on it.A.though B.before C.a(chǎn)s soon as D.a(chǎn)s if【答案】C【解析】句意:你今天早上趕上早班車了嗎?——是的。我一上車,車就開動了。though盡管,引導讓步狀語從句;before在……之前,不符合對話的意思;as soon as一……就;as if猶如,好像。結合下面的回答Yes,說明說話人趕上了早班車,所以選C。28.____it rained a lot, we enjoyed our holiday.A.Although B.Because C.Unless D.However【答案】A【解析】【詳解】句意“盡管雨下得很大,但是我們?nèi)匀幌硎芪覀兊募倨凇?。(引導讓步狀語從句);(引導原因狀語從句);(引導條件狀語從句);,但是(后加逗號)。根據(jù)句意可知,空前和空后之間表示讓步,用although,故選A。29.—Tom, you look tired this morning. What’s wrong?—I was so busy that I didn’t go to bed _____ 12 o’clock last night.A.until B.when C.though D.unless【答案】A【解析】本題符合notuntil的結構,表示直到才,故選答案