You'd better spend as much time as you can________ Maths and English.
--- What do you think of the speech by Mrs. Li?--- Well, it’s quite _______ and all of us are quite ______ at it.
---The air pollution is terrible. --- It will be worse we take action to protect the environment.
_______ of us felt very tired but quite happy after _______ sports meeting.
We found ________ more interesting to watch horror films.
If there no buying and selling of animals, there no killing in nature.