题目内容
It will be many years ______ the doctors and medical scientists can find _____ for cancer.
A.since; cures | B.when; treatments |
C.before; cures | D.until; treaments |
C
解析
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题目内容
It will be many years ______ the doctors and medical scientists can find _____ for cancer.
A.since; cures | B.when; treatments |
C.before; cures | D.until; treaments |
C
解析