You’d better        fatty food if you want to stay slim．

Franklin's ability to learn from observations and experience ____ greatly to his success in public life.

The retired professor, _____ in his new book in the past three years, hasn’t realized the decline in his health. 

—I wonder why Mary is so unfriendly to us.—She is ________ than unfriendly，I’m afraid.

The Thinker, head in hand, resting his right arm on his left knee, gained its current title when ______ in Paris in 1890.