He wrote a letter ________ he explained what had happened in the accident.
#76030
A
what
B
which
C
where
D
as
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The Internet is a wonderful discovery, ___of great significance to people’s lives.
#77945
A
as is I think.
B
which think it is
C
which I think is
D
as I think
The reason ________ he hasn’t come is ________.
#78316
A
that; because he is ill
B
that; because of his illness
C
why; for he is ill
D
why; that he is ill