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选择填空（共15小题，每小题1分）
从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卡上将该选项的答案标号涂黑。
1. - What is _________ matter with you?
- I catch a bad cold and have to see the doctor after ________ school.
A. the; / B. a; / C. the; a D. the; the
2. - Now the air in our city is even than it was before
- So something must __________ to stop it.
从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卡上将该选项的答案标号涂黑。
1. - What is _________ matter with you?
- I catch a bad cold and have to see the doctor after ________ school.
A. the; / B. a; / C. the; a D. the; the
2. - Now the air in our city is even than it was before
- So something must __________ to stop it.
