____some doubt among scientists about the cause of cancer.

doubt of doubt about cancer will become the world's leading cause of death. 英语翻译Scientists doubt the value of traditional knowledge beca the scientists researched the cause of the disease是什么意思 doubt about和doubt of although the cause of cancer ___ ,we do not yet have any pra Cancer is the leading cause of his d_______.（根据首字母填空） scientists didn't know much about lung cancer——. Scientists didn’t know much about lung cancer _____. ___certain doubt among the student as to the necessity of th _a certain doubt among the students as to the necessity of t By the year 2010,scientists probably______a cure for cancer.