单项选择题
A．He was not happy with the new director. B．He was not qualified to be an engineer. C．He wanted to travel. D．He found his job boring.
A．It can be cooked in many ways. B．It is delicious but inexpensive. C．It gives higher yields than other grain crops. D．It grows easily in various conditions.
A．He didn’t like physics any more. B．His eyesight was too poor. C．Physics was too hard for him. D．He had to work to support himself.