There is ____”U” and _____”S” in the word “use”.

Be careful not to drop the Ming Dynasty vase. —Yes, we can’t be ________.

t facts, a person can not form a correctopinion, for he needs to have actual knowledge ______his thinking .

I took part in the summer camp last year. My classmate did it _________.

You should let your children play ______ you can see them.