The medicine works more effectively _______ you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |
I was very cold____they still went swimming.
| A．although | B． so | C．but | D．because |
When she was awake, she found that she was lying on____seemed to be a piece of stone.
| A．that | B．which | C．what | D．it |
---Please tell Bruce he has won the first prize in the maths contest.
---_____He never did so well before.
| A．Congratulations! | B．Good luck! |
| C．That’s right! | D．What a good surprise! |
I got up early this morning, but I ________ so because I was not on duty today.
| A．mustn’t have done | B．needn’t have done |
| C．didn’t need to do | D．can’t have done |
It’s dangerous to have the fire _______ at home all night long.
| A．to burn | B．burn | C．burned | D．burning |