1 . It took a long time for the wounds ________ (heal). (所给词的适当形式填空)
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2 . After years of research, scientists have________ the virus that is responsible for the disease.
A.guaranteed | B.grasped | C.identified | D.healed |
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3 . _________________________ (科学家们非常惊讶海豚竟然藏有治愈人们精神疾病的能力 marvel v), so they decided to make further exploration. (根据汉语提示完成句子)
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