第一部分 阅读理解（共两节，满分40分）
第一节 阅读下列列短文，从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
A
Camels are large animals living in dry areas. There are two species of camels; the Arabian camel with a single hump(驼背) from the dry desert areas of West Asia, and the Bactrian camel with two humps from Central and East Asia. Camels are over 7 feet tall and weigh over 1,600 pounds. They will live up to 40 to 50 years. Most camels are domesticated(驯化) and fed by people. Camels are plant-eaters．
