【題目】He and his wife ______teachers and often help to teach poor children in villages.

A. are both B. both are C. are all D. all are

【答案】A

【解析】

句意：他和妻子都是老師，經(jīng)常幫助教一些村子里的貧困兒童。both兩者都，all三者或三者以上都，主語He and his wife是指兩個人，可排除C,D；不定代詞both放在行為動詞之間，be動詞、助動詞、情態(tài)動詞之后，故答案選A。

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