二、单项选择（25分）
A)请认真阅读下面各题，然后从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. — Do you know what Millie and Andy were doing at 8 o’clock yesterday?
— While Millie_____________ TV, Andy_____________ a book in the bedroom.
A. was watching; was reading B. watched; read
C. was watching; read D. watched; was reading
22. ____ of the students come from America and England.
A. Three-fourth B. Third-four C. Threes-fourth D. Three quarters
23. He told me he had finished the work ________.
A. two days ago B. the day before yesterday C. the next day D. the day before
24. It’s good ___ you to keep____ when you have something difficult_____.
A. for; trying; to do B. of; trying; doing
C. for; to tr y; to do D. of; trying; to be done
