一．听力理解(20分，每题1分)
第一节听下面5段对话，选出最佳答案。
（ ）1. Why does the woman look younger?
A. She is on a diet.
B. She keeps happy every day.
C. She does enough exercise.
（ ）2. What color does Susan like best now?
A. Blue B. Yellow C. Red.
（ ）3. How many pets does Tom have now?
A. Three B. Four C. Five
