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
Elephants have their own way to tell the shape of an object and ________ it is rough or smooth.
#95099
A
不填
B
whether
C
how
D
Which
_______ the smoke come out of the building, my first thought was to call the fire department as soon as possible.
#92680
A
Having seen
B
When seeing
C
When I saw
D
Seeing
Can you believe that in ____ a rich country there should be ___many people.
#92462
A
such, such
B
such, so
C
so, so
D
so, such
Zhongguancun made __________ for him to realize his dream.
#93437
A
that possible
B
it a possible
C
that a possible
D
it possible
It is often ____ that human beings are naturally equipped to speak.
#93184
A
said
B
to say
C
saying
D
being said