问题

I _____ to bed when the telephone rang
A:have been
B:went
C:am going
D:was going
B:went
C:am going
D:was going
正确答案是:
同类题型
Not until the early years of the 19th century ________ what heat was. [ ]
How do you think of my composition— Almost perfect ________ one spelling mistake.
When we _____ after a long talk, we found the children sleeping in _____ beds. [ ]
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