A. Was Jake's surprise such that he didn't know what to answer.
B. Such was Jake's surprise that he didn't know what to answer.
Feedback When we invert the sentence with 'such or so' we put them in the first place. Remember that 'such' is followed by a verb and 'so' is followed by an adjective. Such kind of inversion emphasizes the first part of the sentence and is used both in formal and informal language.
C. Was such Jake's surprise that he didn't know what to answer.
D. Jake's surprise such was that he didn't know what to answer.