. —Why didn’t you response to their greeting?
—Sorry. I ______they ______ to me.
| A．don’t realize; are waving | B．don’t realize; were waving |
| C．didn’t realize; were waving | D．didn’t realize; are waving |
______ of the land in Jia Xing No. 1 Middle School _______ covered with trees and grass.
| A．Two third, are | B．Two thirds, are | C．Two third, is | D．Two thirds, is |
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
| A．gradually | B．loosely | C．exactly | D．frequently |
The last thirty years _________ the quick development in almost every field in China.
| A．have searched | B．have released | C．have seen | D．have determined |
The dog, if trained _____, will be made a good watch-dog one day.
| A．hopefully | B．personally | C．usually | D．properly |
It is required that employees in the company have to have a good__________ of English.
| A．request | B．view | C．design | D．command |