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果,后面是表原因的狀語從句,用because連接。故選A。17.Daming hasn39。A. when當(dāng)……時;指時間;B. if如果,表示條件;C. though雖然,盡管,表示讓步;D. since自從,表示時間的起點。故選D。18.______ many children like KFC, I think they’d better try not to eat it too often.A.Because B.When C.Although D.If【答案】C【解析】考查從句的知識?!眀ecause引導(dǎo)原因狀語從句;when引導(dǎo)時間狀語從句;although引導(dǎo)讓步狀語從句;if引導(dǎo)條件狀語從句。故選C。m sure dreams don39??疾檫B詞辨析。本句是“not …until”結(jié)構(gòu),根據(jù)句意結(jié)構(gòu)和語境,可知選B。A. so that 是固定詞組,引導(dǎo)目的狀語從句時,表示“以便;為了”,從句中常使用can /could /may /might /will /would /should等情態(tài)動詞或助動詞,因此選A。老師大聲說話的目的是讓學(xué)生們都聽到,所以,B、C、D均不符合題意。本題考查連詞的用法。各種年齡的人都可以挑戰(zhàn)自己。22.You’d better take the map with you ________ you won’t get lost.A.a(chǎn)s long as B.a(chǎn)s soon as C.now that D.so that【答案】D【解析】【詳解】句意:你最好帶上這張地圖,目的是為了不迷路。A. as long as只要,引導(dǎo)條件狀語從句;B. as soon as一……就……,引導(dǎo)時間狀語從句;C. now that既然,表原因;D. so that以便,引導(dǎo)目的狀語從句或結(jié)果狀語從句。23._____ they are very tired, they feel happy because they’ve finally finished their project.A.So B.Although C.If D.But【答案】B【解析】【詳解】句意:盡管他們很累,他們感到高興,因為他們終于完成了他們的項目。A. So 因此;B. Although盡管;C. If如果;D. But但是。答案選B。前面意思是“他得掙好多錢”,后面意思是“他能夠給孩子們買好吃的和衣服”。25.—I’m busy with my schoolwork these days.—That’s great! You won’t get good grades ______ you work hard.A.if B.becauseC.unless D.a(chǎn)fter【答案】C【解析】試題分析:句意:這些天我忙著學(xué)校工作。A. if如果; B. because因為; C. unless除非; D. after在……之后,根據(jù)句意此題選C??键c:考查副詞的用法。A. if“如果”;B. unless“除非;如果不”;C. until“直到”;D. since“自從;既然”。結(jié)合選項的意思和句意可知,用unless。28.Pandas are facing danger!The situation won’t change humans stop killing.A.unless B.though C.if D.a(chǎn)fter【答案】A【解析】試題分析:句意:熊貓面臨危險。此題考查連詞,A如果不;B盡管;C如果;D在之后??键c:考查連詞。if是否,如果;unless除非,如果不;though雖然,盡管;because因為?!究键c定位】考查連詞辨析30._______ you do in the future, you should try your best to do it well.A.However B.Whenever C.Whoever D.Whatever【答案】D【解析】試題分析:句意:無論你將來做什么,你都應(yīng)該盡你的最大努力把它做好。根據(jù)句意可知,這里表示無論你做什么,所以應(yīng)該用whatever。