29. sport, game

game指决定胜负的游戏,通常有一套规则 eg:His favorite sport is swimming.

30. price, prize

prize奖,奖品,奖金 eg:win the first prize The price is high/low.

31. a number of, the number of

a number of许多,谓语动词用复数;
the number of…的数目,谓语动词用单数。eg:The number of students is increasing.

32. in front of, in the front of

in front of范围外的前面;
in the front of范围内的前面 eg:In the front of the room sits a boy.