1. It is quite clear that (Them is no doubt that/ Some people believe that)..， because...
2. There is a wide spread concern that many large state-owned companies are in deficit (quite a few Chinese cities face the problem of water shortages， industrial pollution and waste of energy/various kind of superstition flare up/... )
3. The government is (We are) seriously concerned with wildlife extinction (drug abuse/widespread corruption/organized crimes/high unemployment rate/...).
4. Many people often ask such question:”...’? ( More and more people have come to realize...)
5. In the past two decades ( In the past five years)， millions of private enterprises( private schools/supermarkets/fast food restaurants/... ) have mushroomed all over China.