In the experiment you should keep a watchful eye ______ the developments and record every detail.
#84131
A
in
B
at
C
for
D
on
推荐题目
We had waited for a long time before the famous singer     .
#72155
A
turned up
B
turned off
C
turned on
D
turned down
 All the tourists _______ about the bad service in that restaurant. 
#74846
A
explained
B
expressed
C
promoted
D
complained
To make your work easy to solve, you can______ with one other class member if you want. 
#83596
A
make up with
B
team up with
C
catch up with
D
put up with