单项选择题

The underlined words“this fact”in Paragraph 3 refer to the fact that____．

A．it costs a lot to test a plane
B．the wings are not good enough
C．some problems are found with a plane
D．the wings meet the high-speed air flow in the tunnel

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单项选择题

Which of the following would be the best title for the passage

A．Protect Yourself
B．Try to Speak Out
C．Share Your Opinion
D．Face Your Superior

单项选择题

One of the objectives of AT courses is to____．

A．train people to trust others
B．encourage people to share their thoughts
C．tell people of their right to be“superiors”
D．help people overcome their fear of asserting themselves