Rewrite the following sentences without changing their original meaning. Begin with the worlds or phrases given:
1. Scientists have invented new devices to help people live a longer life.
-> New devices.............
2. I can't tell you because I don't know the answer.
-> If...................
3. "My mother will celebrate her birthday next weekend."Patricia said.
-> Patricia said..............
4. They provided food then cleared up the debris.
-> After they had............