It is not_______ for me to return all thebooks to the library now because I still need them

Mr Wu is one of ________ in our school.

You _____ such a serious mistake if you had followed his advice.

I promise Shirley ______ get a new iPad on her birthday. — Will it be a big surprise to her?

When I was twenty, I had to ___ before graduation and work in a clothes shop to help support my family.