______ is known to us all is that the old worker, ______ life was hard in the past, still works hard in his seventies.
We should avoid ________ untrue claims about the products or services.
The country life he was used to ________ greatly since 1992.
The boy ________ on the playground _______ to me that he _______ my coat on the grass.
It was rude ______ you to stare at the foreigner when he passed by just now.
If you ask me, I would say that I won’t mind ______abroad to enrich my knowledge.