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I phoned you at 9:00 this morning but got no answer.

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/06/01 22:22:58
I phoned you at 9:00 this morning but got no answer.
l am sorry .l _____ the bell.l____in the garden .
A haven't heard,must have been.
B didn't have heard,must be
C didn't hear,must have been
D didn't hear,must be
选哪个?为什么?
选C
I am sorry .I didn't hear the bell(at that moment).I must have been in the garden .
没有回复的原因是(当时)我没有听到铃声响.MUST表推测,用完成式表过去时间里发生的行为或动作.