Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.
#92420
A
since
B
after
C
before
D
when
推荐题目
The reason Beethoven went away to the country is ______.
#95022
A
that he was gradually going deaf
B
because he was gradually going deaf
C
on account of the fact that he was gradually going deaf
D
since he was gradually going deaf
---It’s burning hot today, isn’t it? ----Yes. ________ yesterday.
#92103
A
So was it
B
So it was
C
So it is
D
So is it
_________ happened to be no one in the building when the fire broke out.
#94807
A
It
B
There
C
This
D
That
—Daniel must have lost his job in that unemployment crisis, he?—I don’t think so. Yesterday I saw him working together with his colleagues.
#93210
A
didn’t
B
doesn’t
C
mustn’t
D
hasn’t