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f not,引導(dǎo)條件狀語從句,故答案為B。A. if如果;B. unless除非;C. as soon as一……就;D. while正當(dāng)……的時(shí)候。【考點(diǎn)定位】考查動(dòng)詞的時(shí)態(tài)。4.Peter, please send us postcards we’ll know where you have visited.No problem.A.but B.or C.for D.so【答案】D【解析】句意:——彼得,請(qǐng)給我們及明星片,這樣我們將會(huì)知道你參觀過哪里。故選D。本句是讓步狀語從句,根據(jù)句意結(jié)構(gòu)和語境,可知選C?!军c(diǎn)睛】這四個(gè)選項(xiàng)都是連詞,但是意思和用法各不相同。A. unless除非;B. until直到;C. although雖然;D. as long as只要。考查連詞的用法。故選D。 She said not to close the window 常見的時(shí)間狀語從句的連詞有:as soon as,when,while ,as,until等。如果沒有水。though盡管,引導(dǎo)了讓步狀語從句;as當(dāng)……時(shí)候,引導(dǎo)時(shí)間狀語從句;since因此,引導(dǎo)原因狀語從句;unless除非,引導(dǎo)條件狀語從句?!眜ntil直到;before在……之前;while表示當(dāng)……時(shí)候,after在……之后。所以選B?!堑?。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。本題考查連詞。C. when當(dāng) 從…以來。才考查句子時(shí)態(tài)。17.________ I came back home yesterday, my mother was looking ________ a magazine.A.While。While當(dāng)…時(shí)候,引導(dǎo)時(shí)間狀語從句,從句中的謂語動(dòng)詞應(yīng)該是延續(xù)性的;When當(dāng)…時(shí)候,引導(dǎo)時(shí)間狀語從句,從句中謂語動(dòng)詞可以是延續(xù)性的,也可以是瞬間性的;through穿過,通過;around周圍。s go climbing Langshan Mountain this Saturday __________ the weather is fine.Good idea!A.though B.if C.unless【答案】B【解析】【詳解】句意“如果天氣好,周六我們?nèi)ヅ缻~山吧。19.—Betty, do you know if Tony ______ the photo petition?—He will, if he ______ his project on Australia.A.enters。 will finish【答案】C【解析】【詳解】句意:貝蒂,你知道托尼是否要參加攝影比賽?他會(huì)的,如果他完成了有關(guān)澳大利亞的課題。A. as soon as一……就……。故選A。故選B??键c(diǎn):考查連詞辨析。她喜歡和媽媽一起享用?!澳懵牰蠋熤v的了嗎?”“不。25.I think he’s been drinking, _________ I’m not pletely sure.A.if B.though C.until D.a(chǎn)s【答案】B【解析】if “如果、是否”;though “雖然;盡管”;until是“直到……才……”;as “由于、因?yàn)椤薄?6.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(xiǎn)??键c(diǎn):考查連詞。 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。考查連詞用法。A. because因?yàn)椋籅. if如果;C. until直到……才;D. unless除非,如