MCQOPTIONS
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| 1. |
Recently, UN expert David Boyd said over ________ billion people regularly inhale air so polluted that it puts their life, health, and well-being at risk. |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| E. | 14 |
| Answer» B. 8 | |