Điền từ thích hợp vào chỗ trống

1. it -------- (know) that you were ill last week, i would have gone to see you.
2. i would have bought a new bicycle if i ------- (have) enough money.
3. If i had had a motorbike, i ------ (go) home immediately.
4. If he had worked hard, he ------- (pass) his examination.
5. We ------ (enjoy) the party better if it had not been so long.
6. He wouldn't have begun to learn Russian if he ------ (know) the diffculties.
7. If the rain ------ (stop), i would have gone for a walk.
8. If you ------- (call) him, he would have come.