Scientists say it may be five or six years_______it is possible to test this medicine on human patients.
#92600
A
when
B
after
C
before
D
since
推荐题目
Last summer I took a course on _______ poisonous gases.
#92450
A
how to deal with
B
what to deal with
C
how to be dealt with
D
what to be dealt with
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
#93739
A
when
B
where
C
what
D
which
This classroom is __________ that one.
#91879
A
three times bigger as
B
three times as big
C
three times the sizeof
D
as three times big as
Statistics show that men have _____ as women do for every mile they drive．
#93537
A
serious accidents as twice many
B
twice as many serious accidents
C
twice serious accidents as many
D
serious accidents as many twice