... be) a cat, I( jump) into your lab.18.You study hard.If you study hard, you have good grades. 19. My wife and I want to buy a house, but houses are too expensive.We (buy) a house if we( have) ... Should he refuse you, let me know it at once.3. Were he an honorable man, he could not behave this.4. Should you se him, remember me to him, will you?5. Had we known that, neither of it would ... not step) on the grass.8. He wouldn’t have begun to learn English if he( know) the difficulties. 9. If wishes( be) horses, beggars would ride.10.If you( not tell) me about it, I might have never...