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 of 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 of C. of them D. of that |
答案：A