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        1. My mother goes shopping,______I must look after my little brother.
          A.soB.becauseC.a(chǎn)ndD.but
          A

          試題分析:because 是從屬連詞,接表示直接原因的從句,一般放在主句的后面,也可放在主句前面,它表示的語(yǔ)氣最強(qiáng),在回答why的問(wèn)句時(shí),必須用because。as 是從屬連詞,說(shuō)明一般的因果關(guān)系,語(yǔ)氣比because弱,說(shuō)明比較明顯的原因,它引導(dǎo)的從句通常放在句首,有時(shí)也可放在句末。And是和的意思,表示并列或順承;but表示轉(zhuǎn)折,根據(jù)語(yǔ)境可知選擇A.
          點(diǎn)評(píng):because只能放在句子中間,在它之前的是結(jié)果,后面的是原因. so做所以解釋時(shí)也是放在句子中間,在它之前的是原因,后面的是結(jié)果.
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