Ex2. Complete the sentences with is/ are, has/ have or dose/do
1. Either John or you ___________to be responsible for the unfinished work.
2. David, as well as his friends, ___________collecting waste paper to recycle.
3. John and Helen ___________not admit to have broken the window.
4. Neither Tom nor his friends___________lost the keys

Ex3. In each of the following sentences, put the verb in brackets into the correct form
1. Two weeks (go) ________________ fast when you are on vacation.
2. Many of the girls in my school (wear) ________________ white shirts.
3. Three kilos of potatoes (make) ________________ the basket heavier.
4. Some of the tables in the classroom (be) ________________ broken.