题目内容
Kate and I _______ doing ________ homework now.
| A．am their | B．are their |
| C．am our | D．are our |
D
解析试题分析：句意：现在，凯特和我正在做我们的作业。分析：通过时间状语now, 体现为现在进行时，主语是两个人，因此be动词为are; 同时考查固定短语do one’s homework.故选D
考点：考查主谓一致及代词。
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