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
19．_____ your advice, I’m sure to consider it and give you reply in time.
#28016
A
In spite of
B
But for
C
Because of
D
As for
It was indeed an accident, but you make it sound as if I did it______!
#26400
A
on my own
B
by accident
C
on purpose
D
by hand
Young children are often advised not to spoil their appetite by eating sweets ________ the three meals.
#26370
A
among
B
during
C
between
D
through
Nick, it’s good for you to read some books __________China before you start your trip there.
#26873
A
in
B
for
C
of
D
on