[填空题]Scientists believe that the things people do that send ______________________ gases into the air are making our planet warmer.

[填空题]Scientists believe that the things people do that send ______ gases into the air are making our planet warmer.

[简答题]According to scientists, many people believe that physical cleanliness is strongly linked to ______.

[填空题]Scientists believe that by raising atmospheric pressure and surface temperature, it is possible to transform the climate of Mars to the point where humans would be able to live there. The process by which a hostile or unsuitable environment is transformed into one that can sustain human life is called terraforming. In addition to potentially providing an alternate home for the people of Earth in the future, this undertaking may also allow scientists to test hypotheses about the process of global warming, which is a highly pertinent issue affecting our planet today.
Which of the following can be inferred from the passage regarding the Martian atmosphere
A. A．It has a lower pressure than Earth’s atmosphere.
B．It has a higher surface temperature than Earth.
C．It can most certainly be transformed to be more like Earth’s atmospher

[填空题]Scientists believe that uranium was absorbed by the Earth when it was formed.

[简答题]Some scientists believe that yawning is just to make us______.

[简答题]Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy.

[单项选择]Social scientists believe that societies with a_______ of young men without hope of marriage suffer from instability, violence and surges in crime.
A. swarmage
B. hatch
C. gang
D. surplus

[单项选择]Many scientists believe （　） as a result of a collision between the newly formed Earth and a large asteroid.
A. that the Moon was formed
B. in that the Moon was formed
C. that the Moon formed was
D. when the Moon war formed

[简答题]Many scientists believe that our species ____________(有朝一日会濒临灭绝).

[填空题]Many scientists believe biotech __________________________.(生物技术能够把发展中国家的农业总产量提高25%)

[填空题]Scientists believe that ___________________ (用脑越多，思维就越活跃).

[多项选择]People should sometimes do things that they do not enjoy doing. Do you agree or disagree with this statement Write an essay of about 400 words to state your view. In the first part of your writing you should present your thesis statement, and in the second part you should support the thesis statement with appropriate details. In the last part you should bring what you have written to a natural conclusion or a summary.
You should supply on appropriate title for your essay.
Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the above instructions may result in a loss of marks.

[填空题]Some people do believe that smoking will (certain) _________cause lung cancer.