Part Ⅱ Language Knowledge(45 marks）
Section A (15 marks)
Directions：for each of the following unfinished sentences there are four choices marked A,B,C and D. Choose the one that best completes the sentence.
21. He let out an _______ cry, “we’ve won!”
A. excited B. exciting C. excite D. excites
22. Mary smiled _____ her mother did when she was Mary’s age.
A. as if B. what C. the way D. that
23. The bus rolled into the valley, _______ over 20 deaths.
A. caused B. having caused C. causing D. to cause
24. I didn’t see your sister at the meeting. If she _____, she would have met my brother.
A. has come B. did come C. came D. had come
25. The guard at the gate insisted that everybody _____ the rules, but some students insisted they______
