单项选择题

A．To install a microelectronic wave detector.
B．To raise the alarm.
C．To install cell phone signal shielding facilities.
D．To ask students to switch off the handsets.
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单项选择题
Which of the following statements about iron is true
A．It arrives occasionally in the form of meteorites.
B．It is regarded as a gift from the gods.
C．It is regarded as heavenly element.
D．It tarnishes as slowly as gold.
单项选择题
A．Fill out an application.B．Go back to the university to get his ID.C．Go to see his friend.D．Take a written exam and an eye exam.
A．Fill out an application.
B．Go back to the university to get his ID.
C．Go to see his friend.
D．Take a written exam and an eye exam.
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