III. Use the correct form of the verbs in brackets.
1.      My hair is dirty. I (wash) it.
2.      You have bought a lot of paint. You (decorate) your kitchen?
3.      My dress is too long. I (shorten) it.
4.      My father (teach) English in this school since I (be) 5 years old.
5.      Where is your father? – He (help) my sister with her homework.
6.      Cuckoos (not build) their own nests. They (use) the nests of other birds.
7.      Can we meet at 7 o’clock tomorrow evening? – Yes, I (pick) you up then.
8.      My grandfather (die) when I (be) still young.
9.      Alexander Graham Bell (bear) in Edinburgh.
10. We (not used to) go swimming last year.
11. You (get) used to (eat) with chopsticks soon, David.
12. My sister isn’t used to (go) to bed early.