单项选择题

Under what circumstances are drugs approved（）

A．If they don’t involve any risks.
B．If they produce predictable side effects.
C．When the urgent need for them arises.
D．When tests show that they are relatively safe.

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单项选择题
What’s the relationship between John and Sue now（）

A．Classmates,
B．Colleagues.
C．Boss and secretary.
D．PR representative and client.
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