单项选择题
--I think I'd take the doctor's advice and start running every morning.--Really ______.
单项选择题 --Where is John --He has been busy ______ his homework.
单项选择题 My present job is ______ too much of my study time.
单项选择题 News writers know their readers have limited time and usually give the ______ develop-ments of an event first.
