问题
Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.(2012·浙江，17)
A:which
B:who
C:where
D:whom
B:who
C:where
D:whom
正确答案是：
同类题型
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he quality-oriented education being carried out,teachers won’ttoo much importance tostudents’ grades
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