More complex animals gradually evolved from these very simple creatures.

• A. resolved
• B. involved
• C. revolted
• D. developed

Many birds didn't survive the severe winter.

• A. have enough food
• B. surprise
• C. get over
• D. continue to live

Do you realize that by this time next week we have been in Paris?

 Rare animal extinction is one of the ______ things that could have happened.

• A. good
• B. best
• C. worse
• D. worst

Living in a big city isn't ____ interesting as I thought it would be.

• A. less
• B. most
• C. more
• D. as

 We need to do this ____ than we are at the moment.

• A. quickly
• B. the quickest
• C. more quickly
• D. most quickly

Take a book with you, in case you will have to wait for a long time.

The main threat to the survival of these creatures comes from their loss of habitat.

• A. service
• B. surprise
• C. continuing to exist
• D. no longer existing

Many species are threatened in the wild due to habitat destruction by man.

• A. usual behaviour
• B. favourite activity
• C. place of living
• D. rituals

We need to prepare for our biology assignment about endangered plant species.

• A. harmless
• B. dangerous
• C. likely to go extinct
• D. harmful