He is no longer in good condition, and his ability to work is limited. I ____________ him to give up the job but failed.

Riding a bicycle can be fun. But ______ you ride a bike to work, and then there isn’t one to ride home

I believe we will solve the problem ______. We just need to think harder and try more.

Their relationship，______ onyears of open communication with each other，will last.

What ___ the book I put here yesterday?