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根据括号内所给词选择适当形式填空【解析】
Her parents have gone Beijing on____(busy)
There have been many new____(develop)in electronics
人气:314 ℃ 时间:2020-01-19 01:15:23
解答
1.business因为on business固定搭配意为出差
2.developments表示发展的名词
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