What can I do for you?—I’d like to buy a present for my son, ______at a proper price but of great use

He’s obviously quite embarrassed about it because he _____ me to tell anyone.

She decided to go to Shenzhen to ______ a better job.

It is widely known that burning coal for electricity is one of the main causes for global warming , but we can’t ignore the cars’ _____ to the greenhouse effect.

Gary was behaving as if nothing _______.