Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
#92433
A
since
B
after
C
before
D
when
推荐题目
good manners to say “Sorry” when you knock into someone but no need to say it again and again .
#92894
A
There are ; there is
B
It is ; there is
C
There is ; it is
D
It is ; it is
________________late, he also forgot his books．
#94635
A
Not only the boy turned up
B
Not only the boy turned out
C
Not only did the boy show out
D
Not only did the boy show up
They believe that there is _________ in the world.
#93132
A
no such a car
B
no such car
C
not such a car
D
not such car
There are a few books on the shelf. But only one of them is________.
#93782
A
worth to be read
B
worth being read
C
well worth reading
D
worth read