Take a taxi , _____ you'll miss your train .
A.a(chǎn)ndB.ifC.otherwise D.or
C
祈使句可用來(lái)取代if從句來(lái)表示評(píng)論、提出要求、發(fā)出忠告或威脅等。用祈使句比用if從句表達(dá)更強(qiáng)的緊迫性。在表示評(píng)論和要求時(shí),其連詞用and,表示忠告時(shí)用連詞otherwise,表示威脅時(shí),用連詞of。例如:Fail to pay and they will cut off the electricity . (不交錢,他們就會(huì)中斷供電。)這是客觀的評(píng)論;Tell us what to do and we will get on with it . (如果你告訴我們?cè)撟鲂┦裁,我們就?huì)把它做好。)這明顯是請(qǐng)求;Put on you overcoat when you go out , otherwise you will catch cold . (外出時(shí)你應(yīng)該穿上大衣,不然的話你會(huì)感冒的。)顯然這是忠告;Drop that gun , or I will shoot you . (把槍放下,否則我就開(kāi)槍打死你。)很明顯,這是威脅。
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