Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.
#27470
A
on,try on
B
with, test on
C
on ,test out
D
with,carry out
推荐题目
The girl ____ red was coming up to the gentleman ___ long hair.
#28780
A
in….in
B
with…with
C
in..with
D
with…of
passion, people won't have the motivation or the joy necessary for creative thinking.
#26133
A
For
B
Without
C
Beneath
D
By
Many people are ________ as to what to do when there is a fire.
#25677
A
at a loss
B
at risk
C
at ease
D
at a distance
We have _______ books in our library.
#27714
A
plenty of
B
great many
C
a great deal of
D
great number of
Drunk driving, which was once a frequent occurrence, is now______.
#25600
A
under debate
B
under control
C
under construction
D
under investigation