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外语
--Where is John? --He has been busy ______ his homework.
--Where is John? --He has been busy ______ his homework.
admin
2009-04-10
32
问题
--Where is John? --He has been busy ______ his homework.
选项
A、to do
B、doing
C、do
D、done
答案
B
解析
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本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
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