第一部分词汇知识（共30小题，每小题1分，满分30分）
从各题所给的A、B、C、D四个选项中，选出符合句意的最佳选项。
1. John has been _______ from school for three days now.
A. awake B. asleep C. angry D. absent
2. Borrowers are _______ to return books to the library on time.
A. excused B. excited C. expected D. expressed
