Science is still largely ignorant________the causes of many kinds of cancer.A.aboutB.withC.ofD.to- -以前么有看到过这个呃.求教

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Science is still largely ignorant________the causes of many kinds of cancer.A.aboutB.withC.ofD.to- -以前么有看到过这个呃.求教
Science is still largely ignorant________the causes of many kinds of cancer.
A.about
B.with
C.of
D.to
- -以前么有看到过这个呃.求教

Science is still largely ignorant________the causes of many kinds of cancer.A.aboutB.withC.ofD.to- -以前么有看到过这个呃.求教
be ignorant of/about意为对.无知,to的不知道

选D

D