The art centre is _____ used to be a factory, _____ millions of tractors were made.
__________ the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
He is no longer in good condition, and his ability to work is limited. I ____________ him to give up the job but failed.
---Shall I keep an eye on your house when you are on holiday?---________.
The new road is __________ of the old one.
Electronic devices such as iPods and headphones can do great harm to our hearing if _______ improperly.