单项选择题
--The boy is Telling a lie. --How do you know --His face has given him（）
A. off B. up C. away D. out
单项选择题 At the moment the machine（）at full speed.
单项选择题 Seldom（）my boss in such a good mood since I came to work in this company.
单项选择题 I haven’t seen my neighbors for over a week. They（）on a trip abroad.
