D）Diseases associated with lack of sleep。

17。 A）They are more health-conscious。

B）They are changing their living habits。

C）They get less and less sleep。

D） They know the dangers of lack of sleep。

18。 A）Their weight will go down。

B）Their mind function will deteriorate。

C）Their work efficiency will decrease。

D）Their blood pressure will rise。

Questions 19 to 21 are based on the passage you have just heard。

19。 A）How much you can afford to pay。

B）What course you are going to choose。

C）Which university you are going to apply to。

D）When you are going to submit your application。

20。 A）The list of courses studied。

B）The full record of scores。

C）The references from teachers。

D）The personal statement。

21。 A）Specify what they would like to do after graduation。

B）Describe in detail how much they would enjoy studying。

C）Indicate they have reflected and thought about the subject。

D）Emphasize that they admire the professors in the university。

Questions 22 to 25 are based on the passage you have just heard。

22。 A）It was equipped with rubber tyres。

B）It was built in the late 19th century。

C）It was purchased by the Royal family。

D）It was designed by an English engineer。

23。 A）They consumed lots of petrol。

B）They took two passengers only。

C）They were difficult to drive。

D）They often broke down。

24。 A）They were produced on the assembly line。

B）They were built with less costly materials。

C）They were modeled after British cars。

D）They were made for ordinary use。