21. The cakes are delicious. He would like to have --------third one because ------second one is rather too small.
A. a ; a B. the ;the C. a; the D. the ;a
22.—Take a cigarette, please.
--No, thanks. It’s three years -----I smoked.
A． before B. after C. since D. when
23. –I heard you won the prize in the English contest on CCTV last week.
- That was the second time that I ------the prize.
A. get B. got C. have got D. Had got
