Put the correct form of verb:
1,My mom the (clean).......... window when my father(arrive) .........home.
2,Pay attention to me! I (show)........how (do) ........this kind of exercise.
3,Unless you (help).........yesterday, they (not complete)...........their mission well.
4,My mother told me (turn)...........off the lights before (go)..........out.
5,The wall is so old. It (need/ rebuild)................