.--- I think a design which all the ages and social groups is not easy to make.---I can’t agree more with you.
students are required to take part in the boat race.
It is the test system,the teachers,that is to blame for the heavy burden of middle school students nowadays。
Having failed in many attempts,the bird managed to escape from the cage.
After several part – time jobs, he’s now got a job in a bank.
Since David ________ downloaded a virus into his computer, he can not open the file now.