43. What determines the black and white color of each microsphere?

39. In the reading the underlined phrase ‘get to know him‘ most probably means_____.

11. —When do you go shopping? —I usually go shopping ____ Sunday morning.

18. We are often told ______ at people who are in trouble.

34.

37. When her father painted her first house, the daughter_____.

28.

45. From the last paragraph, we know that          .

40. Which is the best title of the reading?

27.

29.

12. Which slogan can you probably see beside a deep river?