—________ .

A. Oh, I'm afraid I didn't cook very well

B. I'm glad you enjoyed it

C. Come again when you are free

D. It's not necessary for you to say so

Tony was very unhappy for ____ to the party．（2000上海）

A.having not been invited B．not having invited?C．having not invited D．not having been invited

_____ of the land in that district _____ covered with trees and grass. (2000上海)

A. Two fifth; is           B. Two fifth; are                 C. Two fifths; is                  D. Two fifths; are

—________ .

A. It's all right, thanks

B. Yes, go ahead please

C. I don't want to trouble you too much

D. No, please don't do it

[2000上海] Recently I bought an ancient Chinese vase, ________ was very reasonable.

A. which price  B. the price of which

C. its price　　 D. the price of whose