Scientists say it will be five or six years __________ it is possible to test this medicine on humans.
#30743
A
after
B
before
C
since
D
when
推荐题目
____ ，but he still could not understand it.
#32468
A
Told many times
B
Having been told many times
C
He had been told many times
D
Though he had been told many times
.Look out! Don’t get too close to the house ______ the roof is under repair.
#33022
A
whose
B
which
C
of which
D
what
The rock star wore, _____ was very uncommon in the country, a brightly red skirt.
#34538
A
which
B
that
C
what
D
it
We should be able to do the job for you quickly，_____ you give us all the necessary information.
#34080
A
in case
B
so long as
C
if only
D
as far as