Don't let the noise s________ (受惊吓）you.

scare vt. 惊吓, 使恐慌
let sb/sth do

如：We will let Tom have a ticket.我们会让汤姆有一张票的

1.Doesn't scare small children
1.别吓着小孩；

scares

scare

Let后边加的动词是原形。

Let it finish

Let him do

Let it go

所以选A

SCARE
LET 后 是
TO INFINITIVE

scare