根据句子意思, 从方框中选用恰当的单词或短语填空。

at birth, are proud, has been in, sleeping bags, works hard, dream, took a bus, much, popular

46. Sports clothes are more and more　 　     among young people.

47. In order to pass the exam successfully, Henry　 　     every day.

48. My mum has so　 　     housework to do that she never has a holiday.

49. Great changes have taken place in China, and we　 　     be Chinese.

50. There was something wrong with my car, so I　 　     to work this morning.

51. A number of tourists prefer to use　 　     when going camping in the wild.

52. Although Nick is tall and strong now, he weighed only two kilograms　 　     .

53. The boy misses her mother very much. She　 　     Guangzhou on business for a week.