1. What caused the explosion? ⇒What was the cause 2. We’re trying to solve the problem. ⇒We're trying to find a solution with 3. Sue gets on well with her brother. ⇒Sue has a good relationship 4. Prices have gone up a lot. ⇒ There has been a big increase …………………… 5. I don’t know how to answer the question. ⇒I can’t think of an answer ……………… 6. I don’t think that a new road is necessary. ⇒I don’t think there is any need………… 7. The number of people without jobs fell last month. ⇒Last one there was a fall ……………. 8. Nobody wants to buy shoes like these any more. ⇒There is no demand………………… 9. In what way is your job different from mine? ⇒What is the difference……………………….?