单选题
It was (when) she was (about) (to go) to bed (while) the telephone rang.
A、
when
B、
about
C、
to go
D、
while
【正确答案】
D
【答案解析】
改为that。这是一个强调句型：it is…that…，此处是对时间状语when she was about to go to bed的强调。
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