单项选择题
A．the causes for his successes B．some of his failures C．another part of his personality D．why he was left behind the modem competition
A．Put up your hands. B．Don't move or I'll shoot you. C．If you want to have lunch, you must listen to me. D．You go first slowly and we'll have lunch together.
A. Pretending to be somebody else. B. Following somebody from in front. C. Following somebody from behind. D. Standing in front of a shop window.