In the office an electrical engineer is looking through the instructions to know ________ the heat system works before the repair work.
#30344
A
whether
B
why
C
how
D
that
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The old man has four sons, and two _____ turned doctors．
#33617
A
of which
B
of whom
C
of them
D
of that
is known to us a11 is that London will host the 30th Olympic Games next
#32700
A
As
B
Which
C
It
D
What
________ he felt like ________, he reminded himself that he had a family to support.
#33842
A
Every time ; giving up
B
At one time ; to give up
C
At a time; gave up
D
At that time; giving up
---Did you remember to give Jenny the money?--- Yes. I saw her, I’m sure.
#33482
A
So long as
B
So far as
C
The moment
D
Any time
He made a mistake, but finally he solved the problem __________ it got worse.
#30987
A
until
B
before
C
when
D
as