It’s much braver to ask questions than to suppress your question

It’s much braver to ask questions than to suppress your questions and become deadened（ ）the world around you.

of

in

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to

本题考查的是be deaden后面的的介词，deaden sb. to：使...麻木，所以变被动的时候是be deaden to，选D。句意：提出问题要比压抑问题和对周围的世界死气沉沉勇敢得多。