1. Hehls car. That is why his hands are so dirty. a) has greased b) has been greasing c) was greased d) greased 2. The students very hard this year. a) have worked b) have been working c) has worked d) was worked 3.1 __too fast. That is why I am so tired a) have walked b) have been walking c) has walked d) has been walking 4.1 seventeen kilometers. a) have been walking b) have walked c) has walked d) has been walked 5. Don't make so much nolse. I (try) to work. a) tried b) am trying c) am trling d) was trying 6. Why you (cry)? Is anything wrong? a) do you cry b) are you crying c) have you crying d) was crying 7. He (go) to speak to his parents. a) went b) is going c) goes d) gone