The little boy has good manners and is p___________ to people.
The lake is 11 meters d___________ and 48 meters wide.
To be a scientist, you are supposed to have a creative b________.
To his parents' great s____________, Robert got good grades in the final exam.
Man can't live w__________ water or air.
A big smile can bring warmth to people, which ___________ （花费）nothing.
