单项选择题
A．He felt his assignment was tougher than Sue’s. B．His clients complained about his service. C．He thought the boss was unfair to him. D．His boss was always finding fault with his work.
A．Mr. Johnson’s ideas are nonsense. B．He quite agrees with Mr. Johnson’s views. C．Mr. Johnson is good at expressing his ideas. D．He shares the woman’s views on social welfare.
A．If they don’t involve any risks. B．If they produce predictable side effects. C．When the urgent need for them arises. D．When tests show that they are relatively safe.