Taking care of the environment will have a good ____ on the next generation.

Human beings have been creating a huge amount of ___, and it's not good for our environment.

Having a positive(正面) ___ can have a good effect on the people around you.

The police discovered a large ___ of drugs under the floor.

Pollution in our environment is a ___ issue. It's world wide.

If you study hard at a ___ level, it won't be too hard for you when you are at an advanced level.

We must be ____ of the importance of protecting our environment.

Global warming means the ____ is getting higher.

Joanna tries hard to ___ that it's very important to review lessons after class.

One of the 3Rs is ____. It means to sort the trash so that it can be reused again

Please follow the instructionsand do it ___ by ___.