13.Mother told me that she would come back , maybe in a few weeks.

57.from space, our earth, with water covering 70% of its surface, appears to be a ublue planetn.

56.finished his work, he had to stay at home at the weekend.

55.It is no use me not to worry about his injury.

54.That was so serious a matter that I had no choice butthe police.

53.My mobile phone isn＇t working. It.

52.I usedon the left in England, but I soon got usedon the right in China.

51.He hurried to the hospital, onlyhis father had just died.

50.When the little girl awoke, she found herselfby a group of soldiers.

49.He enjoyspop music while I prefer classical music.

48.raw materials into useful products is called manufacturing.