9. He is one of the most famous .........environmentalists...... in the world (environment). 10. If we go on litering, the environment will become ....seriously.... polluted (serious). 11. I think I’ll take your ................... and get the green dress (advise). 12. There are nine planets in the ................................ system (sun). 13. he turned off the ............................. when he went out of the house (electric). 14. There is a .......................... of food and shelter in the refugee (nguoi ti nan) camps (short). 15. The new laws will become ........................ next month (effect) giúp e vs tối e nộp bài r