Before a problem can be solved, it must be obvious ________the problem itself is.(2011·湖南)

He was down all evening, but as soon as his girl friend came in he _____.

依次填入下列横线处的成语，最恰当的一组是（1）香港各界对外国干涉势力说不。香港是中央人民政府管辖的行政区，香港特首普选绝对属于中国内政，事实清楚明白，外国势力________。（2）近日，有网络媒体报道，安阳师院学生宿舍楼走廊安装摄像头，引发部分学生不满。然而，多数网友认为，为了学生安全，学校这一行为________，应该表示理解。（3）网络用语是语言文化在网络时代的发展结果，但井喷很容易鱼龙混杂。这些生造词，既不是社会生活的需要，也无益于人际交流，最容易产生网络对文化的负面效应，所以，必要的规范和禁止________。

Is the modern racing car outside ______,Lucia –Of course not. Nobody but Jim can affordsuch an expensive car. It must belong to ______.

When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals