I’m afraid ______the fire.

A．to

B．of

C．on

翻译下列句子
1. What’s six plus twenty?
___________________________________________________
2.50+20=?
___________________________________________________
3. Do you know the missing number?
___________________________________________________
4. The missing number is twenty.
___________________________________________________

People can't live ________ now. (   )

A．under the sea

B．on the mountain

C．in the countryside

It’s a lovely cat. Please look ____it. (   )

A．at

B．out

C．in

My brother likes to swim _____ the sea. (   )

A．at

B．on

C．in