第二部分 英语知识运用（共两节，满分45分）
第一节 语法和词汇知识（共15小题，每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. John wants to make the effort but lacks ______ clear understanding of _____ key to success.
A. 不填，不填 B. a, a C. 不填，the D. a, the
22. We never dreamed of there _______ such a quiet place in the noisy city.
A. had been B. was C. being D. to be
23. Have you ever met with a situation in your life ______ you can’t understand others even if they have repeated themselves several times?
A. that B. where C. which D. when
24. She had to be called two or three times _______ she would come to her dinner.
A. before B. until C. after D. unless
25. —The picture exhibition bored me to death.
