Put the verbs into correct form

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Ex 5. Put the verbs into correct form
1. If I (know) __________ that you were ill, I (go) __________ to see you.
2. I (see) __________ him if I (go) __________ to the party last night.
3. What __________ (you/do) if you __________ (be) him?
4. If I (make) __________ that mistake again, my teacher (get) __________ angry with me.
5. If he (go) __________ to London yesterday, he (meet) __________ his old friend.
6. My dog (bark) __________ if I (hear) __________ any strange sound.
7. If you (not go) __________ away, I (send) __________ the police.
8. If I (be) __________ in your police, I (accept) __________ Mr. Anderson's invitation.
9. I was busy. If I (have) __________ free time, I (go) __________ to the cinema with you.
10. Why didn't you attend the meeting?
Oh, I didn't know. If I (know) __________, I (come) __________ there.