[单项选择]How can we {{U}}reduce{{/U}} the risk of cancer
A. cut in
B. cut down
C. cut off
D. cut out

[单项选择]How can we {{U}}reduce{{/U}} the risk of cancer
A. cut in
B. cut down
C. cut off
D. cut out

[单项选择]

How can we get rid of garbage(垃圾) Do we have enough energy sources to meet our future energy needs
These are two important questions that many people are asking today. Some people think that man might be able to solve both problems at the same time. They suggest using garbage as an energy source, and at the time it can save the land to hold garbage.
For a long time, people buried garbage or dumped(倾倒)it on empty land. Now, empty land is scarce. But more and more garbage is produced each year. However, garbage can be a good fuel to use. The things in garbage do not look like coal, petroleum, or natural gas； but they are chemically similar to these fossil(化石)fuels. As we use up our fossil-fuel supplies, we might be able to use garbage as an energy source.
Burning garbage is not a new idea. Some cities in Europe and the United States have been burning garbage for years. The heat that is produced by burning garbage is used to boil water. The steam th
A. The garbage burned is turned into fossil fuels.
B. The heat produced is used to boil water.
C. The steam produced is used to make electricity.
D. The steam produced is used to heat buildings.

[单项选择]Woman: How can we get tickets for the Sunday's movieMan: ______.

[单项选择]Early cancer screening can help reduce significantly _____.
A. the death rates for all chronic diseases
B. the kinds of cancer attacking people
C. the cancer incidence rate
D. cancer death rate

[单项选择]How do we explain this variation, and how do we explain the __________ of this adaptation from one generation to another
A. transmission
B. transfer
C. transformation
D. transportation

[单项选择]How can I convince you of that we have almost used up our supplies
A. How
B. of that
C. used up
D. supplies

[单项选择]How many cities in China can we fly to Canada directly from
A. 2.
B. 3.
C. 4.
D. 5.

[单项选择]- How can the problem be solved 　　- Well, we must ______it to the president’s own judgment.
A. depend
B. leave
C. suggest
D. realize

[单项选择]How shall we be ( ) next
A. doing
B. done
C. do
D. does