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老年人來說是很好的運動,但有時也會制造很大的噪音。根據(jù)下文Jeff thought it was worth both the time and the ,這里用Although引導。18. the journey was tiring,Jeff thought it was worth both the time and the money.A.As B.Since C.Unless D.Although【答案】D【解析】【詳解】句意:雖然旅途很累,杰夫認為時間和金錢都值得。A. 以便于,表目的;B. 一……就,表條件;C. 既然,表原因;D. 只要,表條件。t get lost.A.so that B.a(chǎn)s soon as C.now that D.a(chǎn)s long as【答案】A【解析】【詳解】句意:你最好帶上地圖,這樣你就不會迷路。17.You39。結(jié)合句意,后一句表示角色小,前一句表示他對這個角色感到高興,故前后表示讓步關(guān)系,故用連詞though??疾檫B詞辨析。the part was a small oneThe actor was happy he got a part in the a movie,根據(jù)生活常識,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,相當于if not,引導條件狀語從句,故答案為B。15.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冰箱里,否則食物很快就會變壞??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(guān)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(guān)系選擇合適的連詞。句意:為了趕上末班車,我現(xiàn)在必須離開了??键c:考查連詞。however 然而,無論怎樣;whenever 無論什么時候;whoever 無論是誰;whatever 無論什么。根據(jù)I enjoy fresh air so always sleep with the window open 可知除非真的很冷否則總是讓窗戶開著,unless符合題意,故選A??疾檫B詞辨析??键c:考查連詞。so所以;because因為;before在……之前;if如果。so 所以;because 因為,引導原因狀語從句;because for 不符合英語表達習慣;because of因為,由于,后面不能加句子,只能加詞或短語, 所以選D。故選A。根據(jù)后文we have to go to school我們不得不去上學。9.________it’s Sunday tomorrow, we have to go to school.A.Though B.Since C.As D.Because【答案】A【解析】【詳解】句意:盡管明天是星期天,我們不得不還要上學。because因為,表原因;until直到,表時間;though盡管,表讓步;or或者,表轉(zhuǎn)折。他們長時間很累,因為他們忙于工作,每天很少鍛煉。根據(jù)句意可知,空后all of us could understand her表示前面explained…clearly的目的,故用so that引導目的狀語從句,選C。7.Mrs. Smith explained the problem clearly _______ all of us could understand her.A.until B.a(chǎn)lthough C.so that D.a(chǎn)s soon as【答案】C【解析】【詳解】句意:Smith夫人清楚地解釋了這個問題,以至于我們所有人都能明白她。三、如果主句是含有情態(tài)動詞的一般現(xiàn)在時,根據(jù)需要從句多用一般現(xiàn)在時 如:You should be quiet when you are in the reading room 在閱覽室時應保持