______ is often the case is that Tom doesn’t study hard and fails in passing an exam.
#31422
A
That
B
What
C
It
D
As
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— How long do you think it will be _______ the USA recovers from the losses of the financial crisis?— Perhaps four or five years.
#32402
A
when
B
since
C
that
D
before
--With the country’s pension fund gap becoming wider than ever, retirement age should be postponed immediately. ---Easier said than done. we take all factors into account, we shall be faced with some other social problems.
#30736
A
Unless
B
Until
C
When
D
Once
Some experts have said that ________ children believe they can succeed, they will never become totally confident of themselves.
#30261
A
if
B
since
C
once
D
unless
How long do you think it will be _______ China sends another manned spaceship to the moon?
#30358
A
when
B
until
C
that
D
before