This kind of machine ______ cutting meat in big restaurants.A. is used toB. is made fromC. is used for
What a useful dictionary! How long_____ you_____ it?
During the charity walk, people have to walk_____ country parks and_____ hills and mountains.
All the children should be helped when they are ______. They should also be treated with ______.
The old man is ______ weak ______ say any words.
We should try our best _______ poor children _______ clean water and food.