--- I rang you at about ten, but there was no reply. --- Oh, that was probably _

题干

--- I rang you at about ten, but there was no reply.
--- Oh, that was probably _____ I was seeing the doctor.

A．for

B．why

C．when

D．how

上一题下一题 0.64难度单项选择更新时间:2012-07-20 07:17:39

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