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……才,多和not連用。本句是時(shí)間狀語從句,四個(gè)選項(xiàng)都可做引導(dǎo)詞;根據(jù)Leonardo didn39。t win an Oscar和答語中的but he never gave up.,結(jié)合句意結(jié)構(gòu)和語境,可知until符合句意,故選D。14.Tony has had to cook by himself ________ his mother went on business to Guangzhou.A.since B.a(chǎn)fter C.during D.when【答案】A【解析】【詳解】句意:自從媽媽去廣州出差以來,托尼不得不自己做飯。A. since從……以來;B. after在……之后;C. during 在……期間;D. when當(dāng)……時(shí)候。since后跟時(shí)間狀語從句時(shí),表示的是到目前為止的時(shí)間段,從句時(shí)態(tài)為一般過去時(shí),而主句的時(shí)態(tài)為現(xiàn)在完成時(shí),故正確答案為A。15.I didn’t believe I could do it ____ I got to the top of Mount Tai.A.unless B.until C.a(chǎn)fter D.a(chǎn)s【答案】B【解析】試題分析:句意:直到我到達(dá)泰山頂上我才相信我能成功。A. unless如果不,除非,引導(dǎo)條件狀語從句; B. until 直到,引導(dǎo)時(shí)間狀語從句; C. after 在……后,引導(dǎo)時(shí)間狀語從句; D. as因?yàn)?,由于,引?dǎo)原因狀語從句。not …until直到……才,結(jié)合句意,故選B。考點(diǎn):考查連詞的用法。16.Cathy is afraid of the dog. She will run away _______she sees it.A.ever since B.a(chǎn)lthough C.a(chǎn)s soon as D.so that【答案】C【解析】【詳解】句意:凱西害怕狗,她一看到狗就跑了??疾檫B詞辨析。A. ever since自從;B. although雖然、盡管;C. as soon as一…就;D. so that以便;所以。根據(jù)Cathy is afraid of the dog. 凱西害怕狗,可推知是她一看到狗就跑開了,結(jié)合選項(xiàng)可知C選項(xiàng)符合題意,故答案選C。17.—Ling ling, you39。ll feel sleepy tomorrow _______ you go to bed early.—OK, Mom. I’ll go to bed at once.A.if B.unless C.though D.because【答案】B【解析】【詳解】句意:——玲玲,如果你不早點(diǎn)睡覺,明天你會感到困的?!玫?媽媽。我馬上去睡覺??疾檫B詞辨析。A. if如果,引導(dǎo)條件狀語從句;B. unless如果不、除非,相當(dāng)于if not,引導(dǎo)條件狀語從句;C. though雖然、盡管,引導(dǎo)讓步狀語從句;D. because因?yàn)椋龑?dǎo)原因狀語從句。通過分析主從句之間的邏輯關(guān)系可知應(yīng)該選擇引導(dǎo)條件狀語從句的從屬連詞if或unless,再根據(jù)句子所表達(dá)的含義“如果不早點(diǎn)睡,明天就會感到困”可知unless符合語意,排除if;故答案選B。18.If the singer ______ to Zigong ______ September 20th, please call me.A.will get;on B.gets;onC.gets;in【答案】B【解析】【詳解】句意:如果歌手9月20日到自貢,請給我打電話。if引導(dǎo)的條件狀語,時(shí)態(tài)要滿足“主祈從現(xiàn)”,所以第一空是一般現(xiàn)在時(shí)態(tài),主語單數(shù),謂語動詞變第三人稱單數(shù)用gets;表示具體某一天用介詞on。In用在一天中的上午,下午或晚上,用在季節(jié),月份。根據(jù)題意,故選B?!军c(diǎn)睛】if和unless引導(dǎo)的條件狀語從句主將從現(xiàn)常見的有以下幾種情況:一、條件狀語從句的主句是一般將來時(shí),那么從句常常用一般現(xiàn)在時(shí)如:When I grow up,I’ll be a nurse and look after patients我長大后要當(dāng)一名護(hù)士,照顧病人二、如果主句是祈使句,那么從句通常要用一般現(xiàn)在時(shí)如:Don’t laugh at me when I make a mistake.我犯錯誤的時(shí)