search/research/search for (1)He every room in the house． (2)Professor Li is int
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search/research/search for
(1)He ________ every room in the house．
(2)Professor Li is ________ into the effect of smoking on health．
(3)Scientists are still ________ a cure for the common cold．
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答案：
解析：(1)searched (2)researching (3)searching for |