Scientists say it will be five or six years _____ it is possible to test this medicine on human patients.
#68451
A
before
B
that
C
since
D
when
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A proposal has been put forward at a recent video conference _______ measures be taken to raise the citizens’ awareness of traffic safety.
#66832
A
that
B
as
C
when
D
which
In extreme weather, a worn tyre can break easily ______ it’s mended, as is often the case.
#68135
A
when
B
where
C
which
D
that
________ all over the hills and around the lake are wild flowers of different kinds.
#72809
A
To grow
B
Growing
C
Grown
D
Grow
Some researchers believe that there is no doubt______a cure for AIDS will be found.
#67655
A
whether
B
that
C
what
D
which
—How about camping this weekend, just for a change?—OK, ______ you want.
#68417
A
whichever
B
however
C
whatever
D
whoever