Sumit (put) the kettle on the stove and (wait) for the water to boil. Five minute later he (enjoy) his tea. When he happened to look out of the window, to his surprise, a car was standing at the crossing.

He put the kettle on the stove and waited for the water to fever. Five minutes later, he enjoyed his tea. When he happened to look out of the window, to his surprise, a car was standing at the crossing.

Explanation:

The phrase shown acia was complemented with the verbs presented in parentheses, respecting the coherence and conjugation of the verb that best suited the verbal and nominal agreement that the phrase presented. Thus, these verbs are in accordance with the pronouns presented, genders, degree and number of all other grammatical classes presented in the text.

the words "strangest" and "unusual" suggest (:

the author develops a cold, and scared tone. making the reader shudder with fear, and suddenly become cold. i'm guessing that he's writing a scary novel, or maybe about a chilly december night.