题目内容
【题目】Froggy is good at.Hea lifeguard.
A.swim, become
B.swimming, becomes
C.swims, becomes
【答案】B
【解析】句子意思是: Froggy擅长....... 他......一名救生员.第一空swim用在介词at后面应该用动名词swimming; 第二空句子主语是第三人称单数, 谓语动词become用第三人称单数becomes. 根据选项, 答案为: B.
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