18．Peter didworst（bad） in drawing in his class．

分析 彼得在班里畫得最差．

解答 答案：worst．
根據(jù)Peter did--（bad） in drawing in his class，可知彼得在班里畫得最差，根據(jù)in his class可知句子應(yīng)該用最高級(jí)形式．故填worst．

點(diǎn)評(píng) 本題考查用所給單詞的適當(dāng)形式填空，首先要根據(jù)語(yǔ)境明確句意，然后再根據(jù)相關(guān)語(yǔ)法對(duì)所給單詞在形式上做出正確的變化．

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