问题描述：
Do come here on Monday,___we,as planned,will take part in the gathering of AIDS prevention
Do come here on Monday,____ we,as planned,will take part in the gathering of AIDS prevention volunteers.
A．then B．and C．therefore D．or
为什么不选A
Do come here on Monday,____ we,as planned,will take part in the gathering of AIDS prevention volunteers.
A．then B．and C．therefore D．or
为什么不选A
问题解答：
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