单项选择题

The United States is concerned about ______.

A．the possibility that the nuclear material might be used to produce weapons
B．the safety of nuclear power stations
C．the pollution of the nuclear waste
D．Iran’s ability to process the nuclear waste
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单项选择题
It can be concluded from the passage that ______.
A．all HIV carriers are doomed to die
B．only those who show clinical evidence of AIDS will pass on the virus
C．the number of AIDS cases will be reduced in the 1990s
D．IV drug users are a high-risk group vulnerable to AIDS infection
单项选择题
Which of the following is NOT included in the agreement to be signed between Russia and Iran
A．Russia will deliver nuclear fuel to Iran.
B．Iran will ship waste nuclear rods back to Russia.
C．The two countries will build a road for the shipment of nuclear fuel.
D．Russia will be responsible for the storage of the waste nuclear rods.
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