34. If we don't work hard, we can't earn enough money to buy a new house.
=> Unless
36. Who will teach your children English?
=> By whom ...
Task 2: Rewrite the sentences, using the words in brackets.
38. The food was so hot that we couldn't eat it. (such... that)
40. He usually drove very fast when he was young, but now he doesn't. (used to)