Tom is ______ cleverest boy in the school.

Tom is ______ cleverest boy in the school.

A.far

B.the far

C.by far

D.by far the

答案及解析： D

解析：

句中by far意为“到目前为止”，用作状语;而后接形容词的最高级the cleverest修饰表语boy．