60. Why is it difficult to find a wild bees' nest?
(A)It's small in size．
(B)It's hidden in trees．
(C)It's covered with wax．
(D)It's hard to recognize．

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步筱昕

B1 · 2014/07/23

#1204534

根据文章第—段“Often, these nests are high up in trees, and it is difficult to find them. ”可知B是正确的。