______ he became seriously ill, he still went on working.

I can’t understand the story correctly _________ the new words in it.

The boy ___________ go to bed _________ his mother came back.

Don’t stop working _____ twelve. 

Mr. Brown is 70 this year. Although he is very old, ____ he works very hard.

The boy didn’t go to school ____________his illness(疾病)。

Work hard, _______ you won’t do well in the exam.

I  ______any water ______ bread in the fridge.

______ volleyball here, ______ you may break the windows.

The old man didn’t have a rest ______ his son came back..
A. after             B. until              C. when