Why don’t you do some shopping in the second-hand store -Well, the things there are______, but______.

It is believed that the test system,__________ the teachers, ______to blame for the heavy burdenof middle school students nowadays[ ]

___ the problem of land erosiongetting more serious, the government is searching for a way to deal with it

When you cross the road, youshould be _____ and walk _____

we will build the dam has not beendecided yet, ______