PASSIVE MODALS -WILDLIFE CONSERVATION

Choose the correct alternative. Active or passive?

Supporters of zoos ought to ..... zoos more often

• visit

• visited

• have visited

• have been visited

If they spent time observing zoo animals, they might .... that wild animals shouldn't .... in captivity.

• have realized / keep

• have been realized / have kept

• realize / be kept

• realized / keep

Zoo proponents argue that animals bred in zoos can .......... to increase wild populations.

• use

• be used

• be using

• been used

They also state that these breeding programmes can ..... species from extinction.

• be saved

• be saving

• have been saved

• save

However, the responsability for the survival of wildlife cannot ..... to zoos.

• give

• giving

• be given

• have given

Governments must ..... responsible for the well-being of the planet.

• hold

• held

• be holding

• be held

Many species that are now extinct could..... if governments had acted responsibly at the time.

• have saved

• saved

• have been saving

• have been saved

Wild animals shouldn't ..... in captivity. Zoos ought to ......

• be keeping/ be banned

• be kept / be banned

• keep / ban

• be kept / ban

Endangered species could .... into their natural habitats, but they may ......

• be released / have been destroyed

• release / destroy

• have been released / have been destroyed

• be releasing / be destroyed

People shouldn't ..... to destroy endangered animals' natural habitats.

• have allowed

• allow

• have been allowed

• be allowed