The sentence is: “He was in a hurry and just glanced ............. the letter.”
The verb “glance through” means to look at something quickly, especially to get a general idea — such as reading a document briefly.
This fits the context of being in a hurry and not reading in detail.
Let’s break down the options:
- (A) over — implies physically looking “above” or “across” something, but doesn’t fit idiomatically here.
- (B) at — suggests just looking without depth, but doesn’t carry the meaning of reading or scanning.
- (C) through — correct; it implies scanning the contents briefly.
- (D) into — means deep examination or entry; not appropriate for a quick glance.
Hence, the correct preposition is (C) through.