____was known to us all that Johnson had broken his promise____he would give each of us a small gift.

What are you advertising ______—________. I need a place to stay at.

At home, he keeps some pets，to which he ________ all his spare time.

eter speaks in public, he always has trouble_ the right things to say.

In the 1990’s, many well-educated young people went to Hainan Island ____their jobs.[ ]