In the experiment we kept a watchful eye ________ the developments and recorded every detail.
#28560
A
in
B
at
C
for
D
on
推荐题目
Vitamin C helps our bodies make a special chemical, which _______ affects our brains, making us feel happy.
#26547
A
in all
B
in turn
C
in advance
D
in short
The Yangtze River passes all the way through the province ______ its long journey _______ the coast.
#26822
A
on; of
B
on; to
C
to; to
D
to; of
—Are you free this evening? —Sorry, I’ve promised to have Mary’s radio repaired ____ for her help with my English.
#25433
A
in relief
B
in return
C
in turn
D
in fact
I think he is taking an active part in social work. I agree with you ______ .
#28423
A
in a way
B
on the way
C
by the way
D
in the way
The direction_____ which the president would go was kept a secret_____ safety concern.
#25533
A
for, over
B
from, about
C
in, for
D
at, as