SIA 7 - Grammar Review - Passive Voice, Past Perfect, So...That

Many trees __________ last year.

• are being cut down

• are cut down

• were cut down

This section of the river __________ since last year. The water is not drinkable anymore.

• has been polluted

• has polluted

• is being polluted

All the plastic bottles __________ in the company every month.

• are recycled

• recycle

• are being recycled

Renewable energy sources __________ urgently.

• must be promoted

• must promote

• must promoting

Endangered species __________ nowadays in Costa Rica

• are protect

• are being protected

• protect

The new environmental policy __________ two weeks ago by the new CEO.

• was introduced

• introduced

• was being introduced

A lot of waste __________ every year in the city

• is produced

• produces

• was being produced

Solar panels __________ on top of buildings to produce electricity.

• are installed

• install

• will install

After the beach __________, the rain came and destroyed our plans

• was being cleaned

• had been cleaned

• cleans

Before 2020, many species of bees __________ already __________ exist due to habitat loss

• had - become extinct

• have - become extinct

• became