问题
选择题
The factory produces half a million pairs of shoes every year, _________ are sold abroad.
A．80% of them
B．80% of that
C．80% of the shoes
D．80% of which
答案
答案：D
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The factory produces half a million pairs of shoes every year, _________ are sold abroad.
A．80% of them
B．80% of that
C．80% of the shoes
D．80% of which
答案：D