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