YOU SAID:

He was left utterly flabbergasted.

INTO JAPANESE

彼は残っていた全くびっくり仰天しました。

BACK INTO ENGLISH

He was quite astonished.

INTO JAPANESE

彼はかなり驚いた。

BACK INTO ENGLISH

He was quite surprised.

INTO JAPANESE

彼はかなり驚いた。

BACK INTO ENGLISH

He was quite surprised.