Don’t you think it essential that every resident of Guangzhou spare no effort to make contributions to the 16th Asia Games?
A. should B. will C. shall D. would
Misunderstandings from lack of social communication, unless properly，may lead to serious problems．
A. arisen；handling B. arising；handled
C. rising；handled D. risen；handling
___________ I am willing to go, I would like it better if you went.
A. How B. Where C. While D. If
. He removed the tree ____________ it was the best in the ground.
A. when B. if C. because D. as
. The young man，who by then admission to university，decided to do some part-time jobs to gain more practical experience．
A. gained B. was gaining C. has gained D. had gained
We work together to achieve our common purpose：_________world that is safer, cleaner and healthier than one we found．
A. the；the B. a；不填 C. a；the D. the；不填
