8.　　　 We tried to d______ him from climbing the mountain without a guide.

7.　　　 Police, in white jackets, were d______ the flow of traffic.

6.　　　 There is not really much d______ in their points of view.

5.　　　 What was the latest d______ in medicine?

4.　　　 He was c______ to know what was happening in the office.

3.　　　 He was always able to make c______ decisions.

2.　　　 When ice forms on the bridge, c______ work has to be stopped.

1.　　　 You should give the students a c______ feeling of success. You should often encourage them.

10.　 The ______(人口) of the city rose by 20%.

二十七

9.　　　 Fred’s good nature makes him the most ______(受欢迎的) boy in the school.