76.Do you know the______(important) of English study?

75.The waste has 　　____(pollution) the river and killed all the fish.

74. Millie _______(write) a composition while we ________(read) a text.

73. I saw a piece of glass ________ ( fall) down when I walked past the office.

72. The girl said to ___________(she), “I’m he prettiest girl in the world.

71. Don’t be ___________(frighten). It’s just a toy gun.

70. Inner Mongolia is in the ______(north) part of China.

69. ________(step) on the snakes is very dangerous for people.

68. Tomorrow it will be _____________(fog).

67. It will be windy and cold tomorrow. (对画线部分提问)

　 ______ _______ the weather ______ ______ tomorrow?