33. Birds usually A.(have very) well-developed sense of B.(sight), and the optic lobes of C.(their brains) are D.(correspondingly) large.这是道选错题，请问应该是哪一个选项？好久没有看到这么难的托福语法题了！
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应该是A.
33. Birds usually A.(have very) well-developed sense of B.(sight), and the optic lobes of C.(their brains) are D.(correspondingly) large.这是道选错题，请问应该是哪一个选项？好久没有看到这么难的托福语法题了！
应该是A.