问题
选择题
One of the boys ________ doing __________ homework in the classroom.
A. is; their B. are; his C. is; his
答案
答案：C
本题的含义为其中有一个男孩正在教室里做他的作业，主语为单数第三人称，故本题用is，他的物主代词为his，故本题选C。
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One of the boys ________ doing __________ homework in the classroom.
A. is; their B. are; his C. is; his
答案：C
本题的含义为其中有一个男孩正在教室里做他的作业，主语为单数第三人称，故本题用is，他的物主代词为his，故本题选C。