Although they feel tired,__________they still go on working. 

—You look so tired. What’s the matter?—I was so busy that I didn’t go to bed          12 o’clock last night.

My father doesn’t like surfing the Internet. I don’t like it, ______.

Basketball has a history of nearly 300 years. Today it is still loved by _______ the young _______ the old.

Helen didn’t know anything about it            her father told her.