Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.
#92459
A
before
B
after
C
since
D
when
推荐题目
Rather than _________ on a crowded bus, he always prefers _________ a bicycle.
#92690
A
ride; ride
B
riding; ride
C
ride; to ride
D
to ride; riding
How long do you think it was ______ he got home in such bad weather?
#92115
A
when
B
since
C
that
D
before
It was a serious mistake, ______ caused by carelessness.
#93814
A
which I think was
B
which I think it was
C
I think which was
D
that I think it was
Not until the car looked almost new____ cleaning it.1网
#93516
A
John stopped
B
did John stop
C
stopped John
D
John did stop
The USA is a large country in ________ many different dialects are spoken.
#93665
A
that
B
which
C
where
D
it