单项选择题

Officials believe that ________ are responsible for the destruction of nearly 20,000 square kilometers of jungle.

A．fire disaster
B．environmental change
C．logging and clearing land for farming
D．air warming
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单项选择题
The U.S. aircraft manufacturer Boeing Company is denying report that ________.
A．China’s going to reduce the airliners to be purchased from Boeing
B．China’s plan to buy Boeing jet liners has been suspended because of political tension between Washington and Beijing
C．China wants to increase its buying
D．China will move on with its purchasing plan
单项选择题
A．figureB．shapeC．shadowD．form
A．figure
B．shape
C．shadow
D．form
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