43. According to the author, why certain foods affect our moods has something to do with ____.

( ) 15. The richer countries always raise the prices of their imports.

9.

( )12. The reason why most people talk online is to improve their language skills and learn more about something new.

61. 有些人对别人的工作成果只会挑毛病，却从未提出过什么建设性的意见。

18. ____ there is something else to discuss, I’ll declare the meeting closed.

39. The Love U program functions by helping you ____.

23. All computer systems contain hardware components for input, central processing unit and output, ____ how powerful they are.

(  )13. Jane’s father has tidied the whole garden.

(  )53. You can buy items online at the Black Friday price and then get them at the local store.

59. 他所考虑的不是一个特殊的读者群，而是一般的男女读者。

(  )54. In order to help readers spend their money more reasonably on Black Friday, the author would like to share a few Black Friday tips.