She looks very sad. I want to help her, but I just don’t know ____ to do it.
It’s not my blouse. It may be _______________.
Sam ______ Chinese tea with nothing in it. He says he enjoys the taste very much.
Tom has much difficulty _____ Chinese so he often asks me _____ help
You canthe caketen pieces.
.It’s important __________ us students _______ carefully in class.