问题
选择题
I was on the point of going to bed ________ Mr. Zhang rang.
A．as
B．when
C．while
D．and
答案
答案：B
因为句中的并列连词when =" just" at that time, 意为“这时(突然)”。
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I was on the point of going to bed ________ Mr. Zhang rang.
A．as
B．when
C．while
D．and
答案：B
因为句中的并列连词when =" just" at that time, 意为“这时(突然)”。