1. that 引导的从句
e.g. It is reported that one third of Guangzhou citizens planto buy a private car. (据报道，三分之一的广州市民打算购买私家车。)
2. whether/if 引导的从句
e.g. Whether motorcycles should be banned in Guangzhouhas become an issue of controversy.(广州是否禁摩托车成了有争议的话题。)
e.g. This essay aims to explore why so manywhite collar workers suffer from insomnia. (本文将探讨为什么这么多白领失眠的原因。)
e.g. Who should be responsible for theenvironmental degradation is still unknown.(谁对环境恶化负责还不清楚。)
由关系代词 who, whom, whose, that, which, as引导的从句。
例如：People who arestrongly against human cloning claim that it is immoral and unethical.(强烈反对克隆人的人们认为这样做不道德和不合伦理)
As evil people always have guns, it is dangerous for citizens if the police do not carry them.
Because women’s physiques are different, they are not so capable as men in the fiercely competitive world of the military.
If we tear down the old building, we are ruining the culture heritage and the traditional values as well.
Journalists should be reasonably objective, though complete objectivity will be different to achieve, as everyone has their own opinions and standpoints.
Just as young people can choose to stop working and enjoy their leisure time, old people should also be allowed to continue working.