－Look at the picture. How's the weather?

－It's ________.

[　　]

－________ do you usually have an art lesson?

－Twice a week.

[　　]

Be careful! The water is too hot. You'd better ________ it right now.

[　　]

The twins were born ________ a Friday evening.

[　　]

－Do you know the woman in the red dress?

－Certainly. She's Mrs Xu. She teaches ________ chemistry.

[　　]

I won't believe that little Bob can run 100 metres in 15 seconds ________ I see it with my own eyes.

[　　]

I've read several books, but ________ of them is funny.

[　　]

If you want to go out of a museum, you should choose the sign ________.

[　　]

A．

B．

C．

D．

Jim's sister was badly ill, so he had to ________ his home at once.

[　　]

The computer was cheap. I spent only two ________ yuan on it.

[　　]