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单选题 Many of the observations made by Leonardo a few 400 years ago about the movement of birds’ wings have been verified by modem photos.
A.greater than 400 years ago
B.greater more than 400 years ago
C.a little greater than 400 years ago
D.a little more than 400 years ago
正确答案： D
答案解析: 本题重点考查more than的用法。画线部分出现了a few和400，它们在语义上冲突，不能并用，只能二者选一。四个选项都用了比较结构。A项语义上不通顺，C项也是如此。B项greater与more than形成双重比较形式，违犯语法规则。故选D，其中a little作修饰词。
相关知识：一、词汇和语法
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