[填空题]The amount of waste produced in the world has doubled in the past ten years.

[填空题]Electronic Waste
It has been known since ancient times that certain plants regularly open
their leaves in daytime and close them at night. It was assumed which this 62. ______
periodic change was triggered by the alternating sunlight and darkness. Such
leaves stick to their daily routine even when keeping in constant darkness. 63. ______
What is circadian rhythm Many biological processes follow a 24-hours 64. ______
schedule. These cycles are called circadian rhythms. These innate rhythms are
governed by sophisticated chemical mechanisms can be described as biological 65. ______
clocks. Such rhythms are important for humans too! We sleep through most
of the hours of darkness and are awaken through most of the hours of 66. ______
daylight. Body temperature increases during the day and decreases during the
night. The secretion of various hormones that controls life’s processes rises 67. __

[简答题]{{I}} Nowadays, the world population has been increasing sharply, there might be various reasons for the trend. Then ,what is your opinion Sharp Increase in World Population [*] You are to write a paper of approximately 400 words on this issue. In the first part of your paper, you should present your interpretation of the pictures above and in the second part you should give your reasons for the increase in population with appropriate, details. In the last part you should bring what you have written to a natural conclusion with a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks. Write your composition on ANSWER SHEET FOUR.{{/I}}

[填空题]The price of oil in the world market has (great) ______ increased in recent months.

[单项选择]The amount of heat produced by this electrical apparatus is （　） at will by turning a small handle.
A. different
B. diverse
C. variable
D. various

[单项选择]

Disposing (处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste-disposal problem becomes increasingly difficult.
During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dump site. Residents or trash haulers (垃圾托运经营者) would transport household rubbish, rotted wood, and old possessions to the site. Periodically (定期的) some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by.
Factories, mills, and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem.
Several facts make these choices unacceptable to modem society. The first problem is space. Dumps, which are now called landfills, are most
A. Farm areas accept waste from the city in modem society.
B. There is cheap land to bury waste in modem society.
C. It is difficult to find space to bury waste in modem society.
D. Ways to deal with waste in modem society stay the same.