I.1) I have never swum in the sea.2) he has just come home from work.3) We have already finished doing home work.4) Have you ever tried indian food?5) My sister has never flown in a plane.B. 1) will go / have2) go / will buy3) will take / fits4) don't have / will pay5) will buy / makeC.1) I'm going to play tennis.2) We are going to sleep.3) He is going to do homework.III.1) was having / rang2) ran / was talking3) was drawing / came4) was sunbathing / jumped5) were you doing / was watchingIV.1) the happiest2) the biggest / bigger3) the best / better4) most interesting / more interesting5) the worst / worse