Choose the letter A, B, C or D to complete the sentences

If we dump a plastic into the ground, it __________ a long time to disappear.

Choose the letter A, B, C or D to complete the sentences

Pollutions are harmful __________ human health.

Choose the letter A, B, C or D to complete the sentences

Do you know what is the cause __________ pollution?

Choose the letter A, B, C or D to complete the sentences

My mother has to measure blood __________ every month.

Choose the letter A, B, C or D to complete the sentences

This picture __________ the contamination of ground water.

Choose the letter A, B, C or D to complete the sentences

I can’t hear your voice __________ I’m wearing an earplug

Choose the letter A, B, C or D to complete the sentences

Scientists has just come up __________ a solution to hearing loss.

Choose the letter A, B, C or D to complete the sentences

Could you list some non-point source __________?

Choose the letter A, B, C or D to complete the sentences

 Parents should teach children not to __________ wastes on the road.

Choose the letter A, B, C or D to complete the sentences

__________ pollution is the increase of temperature caused by human activity.

Choose the letter A, B, C or D to complete the sentences

__________ water resulted in the death of many aquatic animals.

Choose the letter A, B, C or D to complete the sentences

 __________ pollution is harmful or annoying level of noise, as from vehicles, industry activities, etc.

Choose the letter A, B, C or D to complete the sentences

Have you ever heard about the __________ of radioactive pollution?

Choose the letter A, B, C or D to complete the sentences

His grandfather made him __________ hard when he was small

Choose the letter A, B, C or D to complete the sentences

What would you do if a factory in your neighborhood __________ untreated water into the river?