Complete the following sentence

Complete the following sentence with a (compound) word derived from the one(s) given in bracket.

I （ ） raised my arm to protect my face. (instinct)

根据前文主语I和后文谓语动词raised，空格处要填副词，副词修饰动词，instinct的副词形式是instinctively本能地，且符合句意。句意：我本能地举起手臂来保护我的脸。