IV/  Complete the sentences with the words in parentheses
.. 10. I’m tired.→ If I (be not)............................ tired, I( help) ............................you. 11. If I (feel)....................................better tomorrow, I (go) ............................to class.  12. . If I (know).................................. that he was sick, I (take).......................... him some chicken soup. 13. If I( have)...................................... a dollar, I (lend )............................ it to you. 14. Why didn’t you tell me when your plane was supposed to arrive?
→ If you (tell).......................................... me, I( pick) ..................................you up at the airport. 15. May be I will buy a car.
→ If I( buy) ..................................a car, I (drive)....................... to Hanoi with my girl friend. 16. If I( be).................................... a cat, I( jump) ....................................... into your lab. 17. My wife and I want to buy a house, but houses are too expensive.
→ We (buy) .................................a house if we ( have)............................... enough money for a down payment. 18. I’m sorry that you didn’t come to the party.
→  If you ( come)....................................................., you (have)............................................ a good time. 19.  This soup isn’t very good. It (taste) _________ better if it (not be) _________ so salty
20.  If I had a typewriter, I (type) _________ it myself