Australia is the largest island (岛) in the world. It is a little smaller than China. But its population (人口) is small. The population of Australia is almost as large as 　39 of Shanghai.

Australia is a beautiful place to take a vacation. There is 　40 air or water pollution (污染) there. The sky is blue and the fields are green.

Last month we 　41 Perth (佩思), the biggest city in Western Australia, and went to an exhibition of flowers. There we saw a large number of flowers. We had a 　42 time there. After visiting Perth, we 　43 a day in the countryside. We 　44 and had a rest at the foot of a hill. It was quiet and we enjoyed 　45 . Suddenly we heard bells ringing on the top of the hill. What we saw made us run back to the car 　46 . There were about three hundred sheep coming 　47 us.

Australia is 　48 for its sheep, kangaroos and koalas (树袋熊). After a short drive from any town, you’ll find yourself in the middle of white sheep. Sheep, sheep, everywhere (到处) are sheep.

(　 )39. A. it　　　　　　　　　　　　　 B. that　　　　　　　　　 C. these　　　　　　　　 D. those

(　 )40. A. plenty of　　　　　 B. few　　　　　　　　　 C. little　　　　　　　　 D. many

(　 )41. A. traveled　　　　　 B. arrived　　　 　　　　　　 C. went　　　　　　　　 D. visited

(　 )42. A. wonderful　　　　 B. sad　　　　　　　　　 C. hard　　　　　　　　 D. special

(　 )43. A. used　　　　　　　　 B. cost　　　　　　　　 C. took　　　　　　　　 D. spent

(　 )44. A. sit down　　　　　 B. sat down　　　　　 C. end up　　　　　　　　　　 D. ended up

(　 )45. A. ourselves　　　　 B. myself　　　　　　　 C. himself　　　　　　 D. themselves

(　 )46. A. happily　　　　　　 B. quickly　　　　　　 C. slowly　　　　　　　 D. quietly

(　 )47. A. on　　　　　　　　　 B. by　　　　　　　　　　 C. towards　　　　　 D. with

(　 )48. A. famous　　　　　　 B. bad　　　　　　　　　 C. ready　　　　　　　 D. good