It was said that _____ was the reason why he didn't attend the meeting.
#71992
A
that
B
why that
C
that which
D
why
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in the regulations that you should not tell other people the password of your e-mail account.
#72904
A
It requires
B
It is required
C
What requires
D
What is required
The great scientist became world-known in the early 1970s,______ he and another scientist made new discoveries about black holes.
#73597
A
which
B
where
C
when
D
then
_________ across the railway, a train hit it.
#67607
A
While walking
B
Walking slowly
C
As the little pig walking
D
While the little pig was walking