I. Complete the sentences. Use the verbs in brackets.
1. The chair will collapse if you (stand) _________ on it.
2. If the little boy (eat) ________ all that he will be ill.
3. If I find your papers, I (telephone) ________ you.
4. What will happen if her parachute (not open) _______?
5. If he ____n____ (need) a television, he can borrow mine.
6. You (have to/get) ________ up at 6 everyday if you want to join us.
7. You (ought to/wait) ________ if you want to see him.
8. If we want to have a good flavor, we (must/cook) ________ it in butter.
9. If you write the message in French, I (can/understand) ________ it.
10. You (need to/change) _______ the background color if the words are blue