20.______ the classroom,the teacher found the students ______,so he was very angry.( 。
A.Step into; talkingB.Stepping into; talking
C.Entering; talkedD.Enter; talked

分析 走進(jìn)教室時(shí),老師發(fā)現(xiàn)學(xué)生們?cè)谡f(shuō)話,因此他很生氣.

解答 答案是B.本題考查非謂語(yǔ)動(dòng)詞的用法;題干第一空需要的是分詞做時(shí)間狀語(yǔ),排除A和D;the teacher和enter/step into之間是主動(dòng)關(guān)系,所以第一空用現(xiàn)在分詞;第二空需要的是賓語(yǔ)the students是補(bǔ)足語(yǔ),talk和賓語(yǔ)之間是主動(dòng)關(guān)系,故用現(xiàn)在分詞,答案選B.

點(diǎn)評(píng) 首先判斷選項(xiàng)中的動(dòng)詞在句中是以謂語(yǔ)還是非謂語(yǔ)形式出現(xiàn),然后根據(jù)選項(xiàng)在句中的功能結(jié)合非謂語(yǔ)的基本用法做出合理的判斷.

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