Be careful to look both ways before you ________ the street．

1. A.
   across
2. B.
   through
3. C.
   walk
4. D.
   cross

 Be careful to look _____ ways before you cross the street.

        A. both    B. all    C. either  D. neither

What time is it? There are many ways you can find out   46  . You may have a watch on your wrist(手腕). You can look at the clock on the wall. You can listen to   47  or call a number on the telephone to get the time.

It has not always been easy to know the time. A long time ago people looked at the

  48   to tell the time. They could tell the time by looking at it in the sky:morning,noon or afternoon.

Around the year 1400, people began to use the hourglass(沙漏). It was made   49   glass with sand in it. It was wide at both ends, but  50   in the middle. The sand ran from one end to     51  in one hour. At the end of every hour people turned the glass over and  52  began to run again.

Hundreds of years later a machine called   53   was invented. After that people made small clocks so that they could bring them in their  54  . These pocket clocks were called watches. Then, during the First World War men   55  wearing their watches on their wrist. It was easier and faster to tell the time.

46. A. the people       B. the time         C. the man 

47. A. teacher          B. music            C. radio

48. A. sun              B. moon             C. earth 

49. A. of               B. in               C. by    

50. A. wide             B. short            C. narrow

51. A. other            B. the other        C. another

52. A. the time         B. the glass        C. the sand

53. A. radio            B. clock            C. watch 

54. A. pockets          B. bags             C. hands 

55. A. hated            B. stopped          C. started