【題目】他們?yōu)榧磳⒌絹?lái)的考試而擔(dān)心。
They the coming exam．

【答案】are；worried；about
【解析】根據(jù)句意可知所缺詞是為······擔(dān)心：be worried about···，根據(jù)句意可知時(shí)態(tài)要用一般現(xiàn)在時(shí)，主語(yǔ)是they, 所以答案是are；worried；about。

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