Scientists say it may be one year or so ________ it is possible to test the new medicine on human patients.
#32551
A
when
B
after
C
before
D
since
推荐题目
Sorry to say it will be years _______ we really have classes here with only 25 students.
#31432
A
since
B
that
C
when
D
before
This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
#31500
A
as
B
since
C
while
D
if
More than 100 students have entered for the competition and gains the most points will be the winner.
#30609
A
what
B
one
C
that
D
whoever
____ he has made up his mind to do something, nothing will stop him.
#33604
A
Once
B
Before
C
Although
D
As if