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He had just sent an e­mail to his pal on the Internet ________ the system broke down.
#30932
A
while
B
when
C
after
D
since
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I have no idea ______ measures the government will take to stop the air from being further polluted.
#30177
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which
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what
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that
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whose
 He had to sell his luxury car, ________ his company was in debt.
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before
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—Children must have access to good books.—I can't agree more. Reading is to the mind ________ food is to the body.
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that
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like
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as
I earn 50 dollars a week, _______ she earns 80 dollars.
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______ he had worked hard all the time, he failed the exam again.
#31873
A
If
B
As
C
While
D
Because