Translation of "Astounded" in Japanese

The news of his sudden death astounded me.

突然の彼の訃報は私を驚かせた。

I was astounded that she can speak 10 languages.

彼女が１０カ国語を話せるのには驚いた。

Tom was astounded and fascinated by what he saw there.

トムはそこで見たものに驚き、魅了された。

I was astounded by the news that Mary won the first prize.

メアリーが一等賞をとったという知らせに私は驚いた。