The more one is _______ the English-speaking environment, the better he or she will learn the language.

Burglar alarms ________ at any time of the day or night serve only to annoy.

Who will ______ your dog when you all go out for a holiday?

Jobs are hard to get and, _______, more young people are continuing their education.

Don’t touch your eyes, nose and mouth, because they aren’t covered by skin and can _______ the virus more easily.

They often use wood as fuel to ________ coal.

The director is going on business next week and the department will be left ______Jack.  

Among ________ writers in the world, only a few will become famous later on in life, and ______ writer is Mo Yan, who has received the Nobel Prize for literature recently.

As was recorded in history , Diaoyu Island has been _________ part of China.

The water and soil conservation project resulted in farmers ______ the crops on the farmland  _____ trees and grass.