It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
The door burst open and __________,shouting with anger.
After __________ the old man, the doctor suggested that he __________ a bad cold.
Seeing the terrible scene, many problems crowded __________ my mind.
As is known, we Chinese people are __________ to win the battle against the present severe drought under the leadership of the Party.
You should understand the traffic rule by now. We have had it __________ often enough.