1.certain:used to talk about a particular person,things,group of things         etc without naming them or describing them exactly.

Jane helped our boss to buy some fruits to the right of the cinema,but she doesn’t asked our boss how to go there and went away.I guess she doesn’t know the certain store.

        2.strangely:in an unusual or surprising way.
Jack’s been acting very strangely while he want to keep fit.Maybe he eats snack when we go to sleep.

        3.definitely:without any doubt.
We are definitely need water in our life.

        4.heated:an argument etc that is full of angry and excited feelings.
Last night,my friend and I wanted to drink at the bar,but there was a heated fight, so we just stayed at home watch TV.

           5.insist:to say firmly and often that something is true,especially                    when other people think it may not be true.
Her mother told her when her grandmother was died that will became the star in the sky.when her classmates asked her where her grandmother was,she pointed at the sky and said, ‘It’s there.’ They were laughing and told her that’s impossible,but she insisted that it was true.