We need some more facts and figures __________ we take the final decision.
A.sinceB.beforeC.a(chǎn)fterD.until
B

試題分析:考查連詞的用法,A. since自從;B. before在…之前;before主要引導(dǎo)時(shí)間狀語(yǔ)從句,意為“先于”“…之后才”“(不多久)就…”。當(dāng)主句是將來(lái)時(shí)時(shí),從句謂語(yǔ)動(dòng)詞須用現(xiàn)在時(shí);當(dāng)主句是一般過(guò)去時(shí)或過(guò)去完成時(shí)時(shí),從句常用過(guò)去時(shí)。before引導(dǎo)的時(shí)間狀語(yǔ)從句不能用于否定式。C. after在…之后;D. until直到…,句子意思“在我們做最后決定之前我們需要一些證據(jù)和數(shù)據(jù)”
點(diǎn)評(píng):連詞是高考常考內(nèi)容,判斷從句中用哪個(gè)連詞,需用記住連詞的用法,在句中的作用,需要考生平時(shí)多練習(xí)。
即學(xué)即練:We hadn’t been out for long _________ she felt sick.
A. as      B. while      C. after         D. before
選D   句意:我們還沒(méi)出去多久她就生病了。
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