Chọn đáp án thích hợp

1. Air...,together with littering, is causing many problem in our cities today 
A: Pollute
B: Pollution 
C: Polluting
D: Polluted
2. Teenagers speed most of their time playing computer games,... they lost their interest in daily Activitis
A: Moreover
B: So
C: However 
D: As a result
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