单项选择题

What caused the ban to be put on ivory trade by the UN

A．Legal killing of elephants.
B．Illegal killing of elephants.
C．Conservation and community development projects.
D．Elephants facing extinction.
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单项选择题
The talks will be about______.
A．solving border disputes
B．analyzing their differences
C．finding a way to carry out an agreement
D．revising the terms of their agreement
单项选择题
What prevents Israeli and PLO negotiators from solving their problems
A．The fundamental differences between them.
B．Their reluctance to compromise.
C．Their desire to acquire more land.
D．Their unwillingness to talk to each other.
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