第I卷 （共90分）
第一节：单项选择（共10小题：每小题1分，满分10分）
从A、B、C和D四个选项中，选出可以填入空白处的最佳选项，并在答题纸将该选项标号涂黑。
1.Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
A. /; the B. the; / C. an; the D. the; a
2.I just wonder ____ that makes him so excited.
A. why it does B. what he does C. how it is D. what it is
