—I phoned you at 9 this morning but got no answer. —I am sorry. I _____ the bell. I _____ in the garden.
A．didn’t have heard, must have been
B．didn’t have heard, must be
C．didn’t hear, must have been
D．didn’t hear, must be
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“—I phoned you at 9 this morning but got no answer.—I am sorry. I _____ the bell. I _____ in the garden.A．didn’t have heard, must have beenB．didn’t have hea…”主要考查了你对 【一般现在时】，【将来进行时】，【过去完成进行时】，【过去将来时的被动语态】 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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