Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.
#92420
A
since
B
after
C
before
D
when
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Elworth’s barn burned down, but they saved what cattle _______ were in the barn.
#93482
A
that
B
they
C
there
D
where
In the past few years, so many areas throughout the world have been hit by such destructive earthquakes, snowstorms and tsunamis ________ we have never experienced before, ________ makes us worried a lot about nature disasters.
#93083
A
that; that
B
as; which
C
which; it
D
when; as
He was admitted to a famous university，________ was obvious that his situation had gone beyond his parents’ expectations.
#93461
A
what
B
it
C
as
D
and it
Doing your homework is a sure way to improve your test scores, and this is especially true ____ it comes to classroom tests.
#94806
A
before
B
since
C
when
D
after