II.单项选择（共40题每小题1分）
21. —Did you have a wonderful time in Tibet last Sunday?
—__________ The air is too thin to breathe.
A. Yeah, why not？ B. Oh, great. C. You’re right D. Not really.
22. People choose to shop in the supermarket，for they take an interest in the of goods on offer.
A. price B.variety C.value D.amount
23. —Mom，can I go to the cinema?
—No.I'd rather you ________ a quiet night in front of the TV.
A．will have B．have C．had D．have had
24.It is worth considering what makes “convenience”foods so popular, and ________ better ones of your own.
A．introduces B. to introduce Cintroducing D．introduced
25．It's on the festival occasions________the family get together ________he misses his late father.
A．where; that B．which; when C．when; that D．that; when
