―The river runs clear.―We all appreciate the importance the local government has______ the environmental protection.
The boss looked very worried and demanded that the work________before we went home.
I think you got _______ wrong end of the stick. It’s Tom rather than David who has________good nose for news.
----Mum,we are going mountain climbing this afternoon. -----____________! Sometimes they’ll roll down the hillside.
Watching TV is ________a kind of relaxation , and it also _______ our knowledge.
Children must be _________ to serve(服务) their country when they grow up.