Scientists say it may be five or six years _______ it is possible to test this medicine on human patients.
#33536
A
since
B
after
C
before
D
when
推荐题目
I've become good friends with several of the students in my school I met in the English speech contest last year.
#31150
A
who
B
where
C
when
D
which
__________ he is old, the old man still insists on studying at a night school.
#33830
A
If
B
Although
C
When
D
Because
The suggestion we should have a discussion on this problem is not the one ________he made.
#32023
A
that, /
B
/, which
C
which, that
D
which, /
–I drove to Zhuhai for the air show last week.-Is that you had a few days off?
#77678
A
why
B
when
C
what
D
where
---Do you really want to go out? ---Yes, and I know it may rain . I shall go out.
#33768
A
Otherwise
B
Now that
C
Anyway
D
Or else