题文
Environment is very________，but you don’t understand the_______ of it，you
always drop litter everywhere．
| A．important，important |
| B．important，importance |
| C．importance，importance |
| D．importance，important |
Environment is very________，but you don’t understand the_______ of it，you
always drop litter everywhere．
| A．important，important |
| B．important，importance |
| C．importance，importance |
| D．importance，important |
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