Not until the press reported the pollution _________ why the water supply had been cut off.
#81622
A
people did know
B
people had known
C
did people know
D
had people known
推荐题目
It is required that students______ mobile phones at school, so seldom_______ them using one.
#81834
A
don’t use; will you see
B
should not use; you will see
C
not use; will you see
D
can’t use; will you see
Knowing office rules -- whether ______ or not -- is important, especially for young job seekers.
#81045
A
written
B
writing
C
being written
D
having been written
一How can we reduce C02 in our home?一It’s easy．________ off your TV or computers when you’re not usingthem and you’ll greatly reduce it．
#81996
A
Turn
B
To turn
C
Turning
D
Turned
Only when he is seriously ill ______ in hospital.
#83037
A
he does stay
B
does he stay
C
he stays
D
stays he
Only when the war was over _______ return to his hometowns．
#80567
A
have the soldiers
B
the soldiers
C
the soldiers did
D
did the soldiers