Time moves in one direction, memory in another.

1. The leaves on a deciduous tree fall off in winter.
2. You should train your dog to defecate outdoors.
3. They mocked at the idea.
4. He sent us a message written in cipher.
5. He stood on the podium and the audience burst into applause.
6. The general was successful in the army, but he had a turbulent political career after entering parliament.
7. The accident left her paralyzed in both legs.
8. Drastic measures will have to be taken to restore order.
9. Please heat until all the water has evaporated.
10. She sings in the school choir.
11. After a long walk in the desert, they finally found an oasis.
12. The two countries are contiguous to each other, but the culture are quite different.
13. She was charmed by his engaging smile.
14. We saw a plane giving off a spark of light in the night sky.
15. She looked listless and pale, and wouldn't eat anything.