69. It is the job of the police to prevent crime.

68. She showed much talent for acting when she was very young.

67. The scientists observed the activity of the mice after they were given the drug.

66. Chinese Women's Volleyball Team realized their dream at the 28th Athens Olympic Games.

65. We can't stand waiting in the sun any longer.

64. James can imitate his teacher's speech perfectly.

63. I bought a lot of records which were sung by Song Zuying yesterday.

62. My friend has composed many popular songs which are well received among the young.

61. Hemixed flour with water because he wanted to make dumplings.

60. The foreign friend gave a lecture on IT and social development in our school yesterday.