It will be another 50 years ______ our country is expected to reach the level of a medium developed country.
#30277
A
since
B
before
C
that
D
when
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I showed an old friend of mine around the city, surprise, the changes had been so great.
#34149
A
whose
B
which
C
to whose
D
to which
life will continue on the earth for millions of years to come will depend on the problem of pollution can be solved.
#30117
A
How /whether
B
That/that
C
Whether / if
D
Whether / whether
—Look，the paint is starting to come off ________the wall is damp.—Well，we’d better have the wall repainted some day.
#30619
A
when
B
where
C
if
D
once
Nearly three months had gone by _________ the seriously injured girl showed a slight sign of recovery.
#30635
A
until
B
before
C
since
D
after