1.B. To replace two old stone bridges.
2.D. Millions of coins on the bottom.
3.C. It shut down two border crossings with Libya.
4.D. Devise a monitoring system on the Tunisian border with Libya.
5.C. A plant-powered mobile phone charger.
6.A. While sitting in their school's courtyard.
7.D. It collects the energy released by plants.
8.B. He called the woman and left her a message.
9.C. It has stopped working completely.
10.A. To seek her permission.
11.B. She is having her day off.
12.A. He saved a baby boy's life.
13.B. He is currently unemployed.
14.C. A strong wind.
15.A. She stood motionless in shock.
16.D. She wanted to have an ice-cream truck when she was a little girl.
17.A. To preserve a tradition.
18.C. To allow poor kids to have ice-cream too.
19.A. The reasons for imposing taxes.
20.C. Protecting people's life and property.
21.B. By selling public lands.
22.D. It is surrounded by France on three sides.
23.B. Its ruler Prince Rainier married an American actress.
24.D. Clothing.
25.C. Small countries in Europe.