题目

发达国家针对面临的人口问题采取的对策有（ ） A．计划生育   B．鼓励生育 C．接纳移民   D．鼓励移民   答案：BC______ a little more time to think, he might have acted more sensibly.A．If he tookB．If he has takenC．had he takenD．Should he take