B-36. Which is the best one to fill in the blank?

A、online

B、polluted

C、daily

D、indoor

正确答案：C

37、阅读B-31题干中材料，完成本题。

B-37. Which is the best one to fill in the blank?

A、maps

B、stations

C、space

D、centres

正确答案：A

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