Let’s buy some ________ for Grandparents.—Good idea. They like fruit very much.

You ______be tired after working for eight hours without ______ a rest.

She devoted herself __________ to herresearch and it earned her a good reputation in her field

Excuse me, can I smoke here –No, ______.

It was not until the teacher had explained it threetimes _______ how to work out the problem.