—Has Sam finished his report? —I have no idea. He _______ it in his office the whole morning.
A．writes
B．has written
C．will write
D．was writing
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◎ 知识点
根据n多题专家分析，试题“ —Has Sam finished his report?—I have no idea. He _______ it in his office the whole morning.A．writesB．has writtenC．will writeD．was writing…”主要考查了你对 【实义动词的单数第三人称形式】，【实义动词】，【动词短语】 等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。
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