THE AIR ( BECOME )………..POLLUTED IF THERE ( BE ) ……….. TOO MUCH EXHA...

4. - LTHI VAO 10TU LUAN 6
LTHI VAO 10TU LUAN 6
4. The air ( become )………..polluted if there ( be ) ……….. too much exhaust fume in the air.II/ Fill in the blanks with the appropriate form of the words in parentheses.(1.0m)