单项选择题
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.
A．Classmates, B．Colleagues. C．Boss and secretary. D．PR representative and client.