11.It must have been something serious,____ they wouldn't have radioed for help.( 。
A.or elseB.in caseC.in thatD.or rather

分析 一定是出了什么嚴(yán)重的事情,否則他們不會(huì)發(fā)無(wú)線電求救.

解答 答案:A 題干中they wouldn't have radioed for help是虛擬結(jié)構(gòu),表示與事實(shí)相反的假設(shè),說(shuō)明前面應(yīng)該是一個(gè)隱含條件;or else否則,in case以防萬(wàn)一,in that因?yàn),or rather更確切的說(shuō).故選A.

點(diǎn)評(píng) 從屬連詞是連詞的一種,用來(lái)引導(dǎo)名詞性從句和狀語(yǔ)從句.大致可分為三大類:that(無(wú)詞義,不做成分)if,whether (表達(dá)是否的意義,但不做句子成分); 連接代詞:who,whom,whose,what,which,whatever,whoever,whichever(有詞義,在句子中可作主語(yǔ)、表語(yǔ)、賓語(yǔ));連接副詞:when,where,why,how,how many,how long,how far,however,whenever,wherever (有詞義,作從句的狀語(yǔ)).學(xué)習(xí)時(shí),要注意區(qū)分和掌握.

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