The Spring Festival is coming soon. Do you want to have a trip during the Spring Festival? What about going to Beijing and Shanghai? They are big cities with a long history. You can also visit many famous places. Now Shunfeng Club, a travel agency(旅行社), has some tour groups for you this year. You can know more about the tour groups for Beijing by 0312－2345867, and the tour groups for Shanghai by 0311－5368745.

选出不同类别的单词。

(____)1. A. plate         B. how          C. cake

(____)2. A. some        B. many         C. how

(____)3. A. is           B. one          C. three

(____)4. A. one         B. a            C. an

(____)5. A. you         B. they         C. this

在做“探究光对鼠妇生活的影响”的实验时，应该设立两组，进行对照实验，这两组的对应变量分别应该是（  ）