29. sport, game
sport多指户外的游戏或娱乐活动，如打球，游泳，打猎，赛马等;
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
price价格;
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.
33. of the day, of a day
of the day每一天的，当时的，当代的;
of a day暂时的，不长久的 eg:a famous scientist of the day
34. three of us, the three of us
three of us我们(不止三个)中的三个;
the three of us我们三个(就三个人)eg:The three of us---Tom, Jack and I went to the cinema.
35. by bus, on the bus
by bus表手段，方式，不用冠词;
on the bus表范围 eg:They went there by bus.
36. for a moment, for the moment
for a moment 片刻，一会儿;
for the moment暂时，一时 eg:Thinking for a moment, he agreed.
37. next year, the next year
next year将来时间状语;
the next year过去将来时间状语 eg:He said he would go abroad the next year.
38. more than a year, more than one year
more than a year一年多;
more than one year超过一年(两年或三年等)
39. take advice, take the(ones) advice
take advice征求意见;
take the advice接受忠告 eg:He refused to take the advice and failed again.
40. take air, take the air
take air传播，走漏;
take the air到户外去，散步 eg:We take the air every day.