Scientists say it may be five or six years ______  it is possible to test this medicine on human patients.
#92459
A
before
B
after
C
since
D
when
推荐题目
____the sketch of Xiao Shenyang made a _____has been known to us all.
#95198
A
That; hit
B
What; strike
C
Why; beat
D
which; knock
__________, she stood there without saying anything.
#93819
A
Tears coming to her eyes
B
Tears came to her eyes
C
With tears come to her eyes
D
Tears comes to her eyes
Hearing the 2008 Beijing Olympic Games ____ __, all the people in the Bird Nest burst into cheers.
#92742
A
declared to be opened
B
declaring to be opened
C
declared open
D
declaring open
The man didn’t know _________ the thief broke into the house and stole all his valuable things  
#93875
A
it was when that
B
when it was that
C
that it was when
D
was it when that