If people keep _______ down the forests, they will have nowhere _______.
The students stopped talking_________the teacher came into the classroom.
---- What would you like, rice or noodles?---- __________. Some bread, please. I am in a hurry now.
--- What do you think of the documentary A Bite of China Ⅱ?--- _________. It has attracted plenty of TV audience.
It’s silly ___________ him to be crazy __________ such a dishonest woman.
--- How many girls are there in your class?--- ________ them __________ over twenty.