72. 99÷33是多少？等于3。

　 ____________ _____________ is ninety-nine ___________ ____________ thirty-three?

　 It comes to three.

71. 当你会见外宾时，首先作自我介绍是礼貌的的行为。

When you meet foreign guests, it is ____________ ____________ for you to _____________ ____________ to them first.

70.　 In 1584, a s_______________ called Simon Stevenius started to think about a set of measures which used the number ten.

69.　 The old man has a son and a d_________________, who are studying in the same school.

68.　 To change a poor country into a rich country, it is n________________ for children to go to school.

67.　 　“You’ve got a bad cold. Let me take your t____________ first.” Said the doctor.

66.　 The story books w_______________ by Joanne Kathleen Rowling sell well.