81．应该每天打扫教室。

　 The classroom should 　　　　　　　　　　　　every day.

75．There are four ______________(季节) in a year.

74．Children like ___________(咀嚼) gum.

73．Do you know how to _____________ (发音) this new word?

72．His father’s ___________(死亡) made him very sad.

71．I have _____________(意识到) it’s important to learn English well.

70．The girl is t_____________ of going out alone at night.