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单项选择题

How long will the sucking of the mosquito last().

A. Less than 8 seconds.
B. No more than 12 seconds.
C. 8 to 10 seconds.
D. About 5 seconds.

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单项选择题Which of the following is NOT the purpose of the summit

A. To work together to fight for more rights for developing countries.
B. To mark the anniversary of Non-aligned Movement.
C. To call for the reform of international institutions.
D. To call for debt reduction for the poor countries.

单项选择题All the following statements are true about the refugees EXCEPT that

A. they have fled away from the fighting in Darfur
B. the internationally recognized standard of water supply is 15 liters a day
C. they are now in a hot and dry region
D. an urgent search for alternative supplies will be conducted for them