1. This campaign ___nature__ keeping Hong Kong clean.
2. Every citizen must __comply with__ the laws.
3. The government should __aim at___ the progress of land reclamation.
4. Students are all ___monitor__ about the examination results.
5. We have to ___conserve___ the use of plastic bags in our lives.
6. As citizens of Hong Kong, we should ____concerned____ our environment.
7. We can ____recycle___ some of the rubbish in order to reduce wastage.
8. It is ___reduce___ not to turn on the air-conditioner so often.