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連詞辨析26.The two panies decided to work together ______ they had mon interest.A.because B.unless C.but D.or【答案】A【解析】【詳解】試題分析:句意:這兩家公司決定合作,因?yàn)樗麄冇泄餐睦?。前因后果,后面是表原因的狀語(yǔ)從句,用because連接。; B. unless 除非,表讓步;C. but但是,表轉(zhuǎn)折;D. or或者,表選擇。故選A。考點(diǎn):考查原因狀語(yǔ)從句的連詞 。27.To make your DIY work perfect, you’d better not start ___________ you get all the tools ready.A.when B.while C.before D.a(chǎn)fter【答案】C【解析】【詳解】句意:為了讓你的DIY作品完美,你最好在你把所有的工具都準(zhǔn)備好前不要開始。When當(dāng)……的時(shí)候;while當(dāng)……的時(shí)候;before 在……之前; after在……之后。所以選C。28.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(yǔ)從句;unless除非,引導(dǎo)條件狀語(yǔ)從句;since自從,因?yàn)椋龑?dǎo)時(shí)間狀語(yǔ)從句;when當(dāng)……時(shí)候,引導(dǎo)時(shí)間狀語(yǔ)從句;條件狀語(yǔ)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。29.– Thank you for telling me so much knowledge about nature.–Don’t mention it. ______ you have more questions, e to me any time.A.IfB.BecauseC.Though【答案】A【解析】句意:——謝謝你告訴我這么多關(guān)于自然的知識(shí)?!?jiǎng)e提了。如果你有更多的問題,隨時(shí)找我??疾檫B詞辨析題。本句是條件狀語(yǔ)從句,需用if連接,而because表原因,though表讓步,都可排除。根據(jù)句意結(jié)構(gòu)和語(yǔ)境,可知選A。30.一Last night I went to a concert of Chinese folk music. Erquan Yingyue was so sad but beautiful that I sensed a strong sadness and pain under the beauty.一So it was. The musician who played it last night to play the erhu since he very young.A.learned。 was B.has learned。 amC.has learned。 was D.learned。 has been【答案】C【解析】句意:昨晚我去聽了一場(chǎng)中國(guó)民間音樂會(huì)。二胡映月是如此悲傷,但美麗,在其美麗的下面我感覺到一種強(qiáng)烈的悲傷和痛苦。的確是這樣。昨晚演奏的音樂家從小就學(xué)會(huì)了演奏二胡。Since引導(dǎo)的時(shí)間狀語(yǔ)從句,從句是一般過去式,主句用現(xiàn)在完成時(shí);故選C。