3.The scientist and engineerhas(have) invented a new machine.

分析 這名科學(xué)家兼工程師發(fā)明了一種新的機(jī)器.

解答 答案是has.本題考查語境中選用所給詞的恰當(dāng)形式;題干中主語是由and連接的并列名詞表示"科學(xué)家兼工程師",指一個(gè)人,故答案是has.注意,如果指代兩個(gè)人,第二個(gè)名詞前要有冠詞.

點(diǎn)評 本題是要求用所給動(dòng)詞的適當(dāng)形式填空,解題時(shí)首先考慮句中需要的是謂語動(dòng)詞還是非謂語動(dòng)詞;其次,如果是謂語動(dòng)詞關(guān)注時(shí)態(tài)、語態(tài)和數(shù)的變化;如果是非謂語動(dòng)詞要聯(lián)系非謂語的基本用法判斷非謂語的形式.

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