Write a second sentence so that it has a similar meaning to the first. Begin with if.
Example: I haven"t got a key, so I can"t get in.
ANSWER: If I had a key, I could get in. We should have bought that picture five years ago because it would be quite valuable now.
ANSWER:
【参考答案】
If we"d/we had bought that picture five years ago, it would ......