What we all know is that the old scientist, _______ life was hard in the past, still works very hard in his eighties.

She has _____ this car for nearly ten years.

My grandmother __________ in Yangzhou. She was bornthere and has never lived anywhere else.

Most of us value our time, but some of us treat it ________ it had no value at all.

Must he finish the work before supper—-No, he .He finish it aftersupper.