Using ほどに with verbs in passive voice

My understanding is that you can form sentences in Japanese equivalent to "the more… the more" sentences in English by replacing the final -u of the verb with -eba, repeating the verb, and adding ほどに, e.g. 日本語を勉強すればするほどに、上手になる。

But how does this work if the verb is in the passive voice? i.e. is this a correct sentence:
外国語に晒されれば晒されたほどに、話す能力は上手になる。

Thanks!