单项选择题

A．Accurate communication is of utmost importance.
B．Pilots should be able to speak several foreign languages.
C．Air controllers should keep a close watch on the weather.
D．Cooperation between pilots and air controllers is essential.
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单项选择题
A．As one of the greatest American scholars.B．As one of America’’s most ingenious inventors.C．As one of the founding fathers of the United States.D．As one of the most famous activists for human rights.
A．As one of the greatest American scholars.
B．As one of America’’s most ingenious inventors.
C．As one of the founding fathers of the United States.
D．As one of the most famous activists for human rights.
单项选择题
A．Punishing students who damage school propertyB．Rewarding schools that have decreased the destructionC．Promoting teachers who can prevent the destructionD．Cutting the budget for repairs and replacements
A．Punishing students who damage school property
B．Rewarding schools that have decreased the destruction
C．Promoting teachers who can prevent the destruction
D．Cutting the budget for repairs and replacements
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