4.This alsokeeps the air,soil,water and cropsfreefromchemicals.(使…免受)

分析 這使得空氣、土壤、水和莊稼不含化學(xué)物質(zhì).

解答 答案是keeps,free from.本題考查語境中選用恰當(dāng)?shù)脑~的適當(dāng)形式.free from形容詞短語,免于,沒有;keep…free from 使免于,使沒有;題干中主語為單數(shù)this,故用第三人稱keeps,故答案為keeps,free from.

點(diǎn)評 翻譯填空要根據(jù)所提供的漢語意思結(jié)合語境和句子結(jié)構(gòu)選擇恰當(dāng)?shù)脑~、短語或句型;同時(shí)注意句子結(jié)構(gòu)和所選詞的形式變化.

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