基本信息
第一节 单项填空（共15小题；每小题1分，满分15分）
21. He wants to have _____ third cake, because _____second one is too small.
A. the; the B. the; a C. a; theD. a; a
22. ---- Why did Mr. Smith not attend the most important conference?
---- It was supposed that he had had a sudden heart _______ just before the meeting began.
