Question

He is _____ careless a student that he often _____ some letters while writing.

A．such; leaves on

B．so; leaves off

C．so; leaves out

D．such; leaves out

Answer 1

C

试题分析：考查so,such用法和固定词组。So+adj+a/an+单数名词="such" a/an adj+单数名词。本题中的so careless a student="such" s careless student.如此粗心的学生。Leave out遗漏；leave off停止做某事，戒除…句意：他是一个如此粗心的学生以至于他在写作的时候介词遗漏一些字母。故C正确。
点评：so后面接形容词或者副词；such后面接名词或者名词短语。特别注意：So+adj+a/an+单数名词="such" a/an adj+单数名词。