A. 对 B. 错
A. 30minutes B. 30hours C. 30days D. 13minutes
A. twice a week B. twice a month C. once a week D. once a month
A. Yes, he dose. B. No, he doesn't. C. It depends D. Sorry, I don't know
A. 60.5 B. 66.5 C. 65.5 D. 55.6