Question

correct the text by inserting two commas. 1 mr. chen just announced much to my surprise that hes leaving for japan on friday.

Explanation:

The phrase "much to my surprise" is a parenthetical expression that needs to be set off by two commas, as it adds extra, non-essential information to the sentence.

Answer:

Mr. Chen just announced, much to my surprise, that he's leaving for Japan on Friday.