— If there are ____ trees, the air will be cleaner.— I agree. Then there will be less pollution.

--- Thomas does well in dancing. How about Bob?--- Bob is_____, I think. He once won the first prize in a dancing competition.

 _________ thing for us is studying hard.

Lucy is the________ of the twins, and she is the_______ girl in her class.

Tina should get the job because she is                than Gina.