Unit 5 vocabulary part of speech

Don't be ___________. Think before you act.

• impulse

• impulsive

• impulsively

It 's such a ___________ that you throw all the leftover away.

• wasted

• wastefully

• wasteful

• waste

We were deeply ____________ by this devastating tragedy.

• sadness

• sad

• sadden

• saddened

I spent a year in the jungle, ______________ how deforestation is affecting local tribes.

• to observe

• observe

• observing

• observed

By ______________ plastic bottles, we can lower the burden to the landfill.

• recycle

• recycling

• recyclable

• recycled

You should bring your own utensils instead of asking Mr Ho for _________ (dispose) ones all the time.

Parents in Hong Kong are always __________ (concern) about their children's academic performance.

The farmer was accused of__________ (cruel) to animals.