9. A. excited B. tired C. pleased D. worried
8. A. neighborhood B. family C. school D. grade
7. A. so B. if C. then D. because
6. A. sixth B. seventh C. eighth D. ninth
5. A. able B. sorry C. glad D. afraid
4. A. either B. too C. though D. yet
3. A. after B. before C. during D. till
2. A. talk B. sit C. study D. walk
1. A. spent B. taken C. cost D. paid
20.D。本句说明这个工人回答彼得的问题之前沉默了一会儿。A选项应用a moment; C选项表示某一点时间; D选项表示一段时间或一会儿,为正确选项。