---I hear the government is going to ___ the air quality with the new standard PM2.5，isn’t it？
---Yes, ___ the air pollution will get more serious.
| A．discover, therefore | B．revise, anyway |
| C．review, however | D．test, otherwise |
---I hear the government is going to ___ the air quality with the new standard PM2.5，isn’t it？
---Yes, ___ the air pollution will get more serious.
| A．discover, therefore | B．revise, anyway |
| C．review, however | D．test, otherwise |
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