2. One of the ________ of our planet’s warming up is an increase in the number of natural disasters.

　　A. consequences　　 B. reasons　　 C. causes　　　 D. processes

第一节：单项填空(共20小题；每小题1分, 满分20分)

从A、B、C、D四个选项中, 选出可以填入空白处的最佳选项，并在答题纸上将该选项标号涂黑。

1．We have every reason to believe that ______ 2010 World Expo in Shanghai will be ______　 success.

A. /; a　　　　　 B. the; /　　　 C. the; a　　　　 D. a; a