阅读下列短文，从每小题的三个选项中选出最佳选项。

    From Monday to Friday, the Chens are very busy.

    Mr. Chen is an engineer in a company. He works from 8:00 am to 5:00 pm.

    Mrs. Chen works in a library in a town. She drives her car to work. On the way to work, she leaves her little son with a baby—sitter. Her daughter goes to school on a school bus. She gets home at 4:30 pm.

    At 4:00, Mrs. Chen comes home from work with her son.

    The Chens usually eat dinner at 8:00 pm. After dinner, the girl does her homework and Mrs. Chen washes the dishes. Mr. Chen sometimes works at home. 10:30 pm is bedtime for the Chens.