18．學(xué)生應(yīng)當(dāng)知道如何學(xué)習(xí)，否則你的壓力就會(huì)大．
Students should learnhow to study，or you'll feelstressed out．

分析 how，or，stressed．

解答 答案：how，or，stressed．第一個(gè)空需要表達(dá)出怎樣，用疑問詞how，構(gòu)成疑問詞+to do結(jié)構(gòu)，作為learn的賓語(yǔ)，否則用or來連接兩個(gè)句子，表示壓力很大用stressed out作為表語(yǔ)，與feel構(gòu)成系表結(jié)構(gòu)，故答案是how，or，stressed．

點(diǎn)評(píng) or用于連接兩個(gè)并列的句子，表否定，表示"否則，要不然"的意思．如：Hurry up，or you'll be late．快點(diǎn)，否則你要遲到啦．

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