16. I could go out because it was very warm.
à It was warm enough for me to go out.______________________________________________________
17. He is quite smart , so he can finish the exercise easily.
à He is _______________________________________________________
18. She has a lot of money, so she can buy that house.
à She has _____________________________________________________
19. Do the test carefully. We have plenty of time.
à We have ____________________________________________________
20. Do you want to pass your examination? Work hard!
à You have to work _______