Many forms of cancer can be cured if detected
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Many forms of cancer can be cured if detected early.
A: selected B: operated C: developed D: discovered
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答案：D
题干意为“如果发现得早，很多癌症都能被治愈。”句中划线词意为发现，发觉，查明。D项discovered意为发现；例句：He was later discov- ered to have been a spy．后来发现他原来是间谋。A项selected意为选择；B项operated意为做手术；C项developed意为发展；故选D.