题目内容
(2014·安徽两所名校联考)A survey ________ by the UN shows developing countries are particularly attractive to tourists.
A. being conducted B. conducted
C. having been conducted D. to be conducted
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题目内容
(2014·安徽两所名校联考)A survey ________ by the UN shows developing countries are particularly attractive to tourists.
A. being conducted B. conducted
C. having been conducted D. to be conducted