单项选择题

Why can’t people on earth be harmed by radiation

A．Because men on the Earth are protected by the atmosphere.
B．Because radiation only has short-term effects on men on the Earth.
C．Because there is a great distance between the Earth and the radiation areas.
D．Because the Van Allen Belts absorb all radiation.
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Where has the process begun
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B．Port Loko.
C．The east of the country.
D．Both Ａ and Ｂ.
单项选择题
What does the professor decide to do
A．To allow the woman to repeat the exam.
B．To reschedule the woman’s exam for another day.
C．To let the woman skip the final exam.
D．To give the woman a grade of incomplete.
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