21. If you go to a desert(沙漠) in Africa, you will see a lot of            .
A. camels        B. pandas        C. elephants        D. tigers
22. If we are             , we want something to eat.
A. thirsty         B. busy          C. hungry          D. happy
23. There were a lot of people in the park. We had ______ to take a rest, so we got very tired.
   A. everywhere      B. somewhere     C. nowhere        D. anywhere
24. It’s a nice house              it hasn’t got a garden.              
A. and            B. or            C. but             D. so
25. Wild animals are losing their living areas because people      trees and forests.
A. cut off          B. cut down         C. cut out        D. cut away