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**Exercise 3. Complete the sentences with the correct form of the verbs in brackets.**

1. I (go) ____________________ to the nursing home to cook for some old people every weekend.
2. We (plant) ____________________ some trees in the schoolyard a few days ago.
3. Jack (start) ____________________ doing volunteer work 5 years ago.
4. you (participate) ____________________ in a charity club every summer?
5. My school (organise) ____________________ a charity event to raise money for sick children in the hospital nearby last May.
6. Tom (not have) ____________________ time to finish his report yesterday.
7. The children (send) ____________________ thank-you cards to us last week.
8. We (clean) ____________________ up the dirty streets in our area every Saturday.
9. They (not join) ____________________ Lending Hand in 2015.
10. My best friend and I (sing) ____________________ for the elderly people at a nursing home last week.