Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.
#70454
A
carried on
B
carried out
C
carried away
D
carried off
推荐题目
Can you think of some cases where drivers obviously______ the traffic rules but don’t obey them?
#68008
A
have instructed in
B
have instructed
C
have been instructed in
D
are instructed
Hangzhou _______ the beautiful scenery of West Lake.
#67948
A
is Known for
B
is known to
C
is known as
D
is know to
It is already 10 o’clock. I wonder how it ______ that she was two hours later on such a short trip.
#66964
A
came over
B
came out
C
came about
D
came up
After he retired from office, Rogers _______ painting for a while, but soon lost interest.
#83241
A
saved up
B
took up
C
kept up
D
drew up