选择题 （共40分）
（将答案按序号填在答卷纸上）
一、单项填空（共15小题；每小题1分，满分15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。
1. Air pollution has become a very serious in China nowadays.
A. accident B. behaviour C. problem D. question
2. — Hi! Mr Li. May I know my score of this math test?
— Sure. You can come with me and check it on my computer for .
A. you B. your C. yourself D. yours
3. — Where is the best location in a cinema when watching a 3-D film?
— Oh, it’s wise to sit it. We may feel better from a distance.
A. from behind B. at the back of C. in front of D. in the front of
