1. According to the passage, which of the following has changed the most in the last 500 years?

　　A. Food.

　　B. Chocolate.

　　C. Potato.

　　D. Coffee.

　　2. “Some”in“Some still exist today”means _____.

　　A. some cocoa tress B. some chocolate drinks C. some shops D. some South American Indians

　　3. Thousands of Irish people starved during the “Potato Famine” because_____.

　　A. they were so dependent on the potato that they refused to eat anything else

　　B. they were forced to emigrate to America

　　C. the weather conditions in Ireland were not sui for growing the potato (责任编辑：admin)