2013年12月英語六級閱讀：仔細閱讀1（滬江網(wǎng)校第二版）

56. B. Raising children is getting expensive.

57. C. Economic downturn.

58. A. Optimism for the future.

59. D. They don't rely on their children to support them in old age.

60. B. To advise couples to think twice before having children.