. 单项选择 1. ----I feel ill , I have got a toothache. ----_______,I think you should eat less candy. A. Don’t worry B. That’s the problem C.I am sorry to hear that 2. _______has Nancy stayed in Hong Kong with her parents ? —For about three weeks. A. How many B. How long C. How often D. How far 3. I have learned about Chinese history a lot _______ I came to China two years ago. A. for B. since C. after D.before 4.Students shouldn’t spend much time ______football after class. A. play B. to play C. playing D.played 5. ________is easy to look after your .____________ A. It; healthy B. It; health C. That; healthy D. That; health