( )12. The reason why most people talk online is to improve their language skills and learn more about something new.

( ) 12. The fish which are caught by a fisherman in South America may be made into pet food.

Conversation 28. 

( ) 15. The richer countries always raise the prices of their imports.

56. 我们应该有远大的志向，不应该安于现状。

( ) 13. A lot of the world’s natural resources come from the poor countries.

39. How do the Germans plan to deal with space junk?

( ) 14. Usually the poor countries decide the prices of natural resources.

（  ）51. Just like love, faith and doing good for others, money is also important to our life.

3.

28. —Did you enjoy yourself last night?—It’s very nice of you. I highly appreciate ____ to the party.

29. Last summer we visited the West Lake , ____ Hangzhou is famous in the world.