BT 1. Xác định dạng của những từ sau:
1. beauty ( ), beautify ( ), beautiful ( ), beautifully ( )
2. reasonable ( ), reason ( ), reasonably ( )
3. industry ( ), industrial ( ), industrialize ( ), industrious ( )
4. comfort ( ), comfortable ( ), comfortably ( )
5. invite ( ), invitation ( )
6. care ( ), careful ( ), careless ( ), carefully ( ), carelessness(…………..)
7. health ( ):…………………………., healthy ( ):………………………….
8. disappointment ( ), disappoint ( ), disappointing ( ), disappointed ( )
9. nation ( ), national ( ), nationalize ( ), nationality ( )
10. act ( ), action ( ), activity ( ), active ( )
11. lazy ( ), laziness ( ), lazily ( )
12. education ( ), educate ( ), educated ( ), educative ( ),
educational ( )
13. success ( ), succeed ( ), successful ( ), successfully ( )
14. pollute ( ), pollution ( ), pollutant ( ), polluted ( )
15. decide ( ), decision ( ), decisive ( )
16. freedom
17. safety
18. Imaginary
19. Secondary
20. Enlage
21. Widen
22. Truth
23. Nature 
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