你将听到一篇短文,请根据短文内容,选出每个问题的最佳答案,并在答题卡上将选定答案的字母标号涂黑。短文读两遍。
17. This program starts ________.
A.at 10: 00 a. m. | B.at 10: 00 p. m. | C.at 11: 00 p. m. |
18. Parents always tell their children to ________.
A.listen to music | B.take music lessons | C.turn music down |
19. In the test, nearly 25% of the students ________.
A.had pain in their ears | B.had mobile phones | C.loved rock music |
20. We can use ear phones for at most ________.
A.half an hour a day | B.an hour a day | C.two hours a day |
21. This program is about ________.
A.the environment | B.health | C.music |