Every driver is familiar with the dreaded blind spot problem. However, it is more than just     1     annoyance. According to the National Highway Traffic Safety Administration, over 840,000 car     2     (accident) occurred due to the blind spot. Those zones which cannot be directly     3    (observe) by the driver often cause incidents that result     4     serious property damage and in some cases even fatalities（死亡）. While drivers can take precautions such as adjusting the driver’s seat and side mirrors     5     (proper), installing backup cameras and so on, they won’t eliminate（消除） the     6     (visible) spots completely. Therefore, the driver will always have to carry the     7     (responsible) of being constantly aware of blind spots as failing to do that can lead to accidents.

Luckily, now there’s a solution for that and it comes from a 14-year-old girl,     8     doesn’t even have a driver’s license yet.

However, not being able to drive didn’t prevent Alaina Gassler from     9     (understand) the important issue of traffic accidents resulting from blind spots.

In fact, she knows the problem so well that she actually     10     (solve) it for us. And the way she did it is nothing but genius.

The trade routes are of great importance. In march, the Suez Canal, one of the world's most important sea trade routes,     1     (block) by a ship, causing an epic maritime traffic jam of nearly 300 ships between Europe and Asia. Besides the Suez Canal, China's ancient Silk Road also played     2     important role in trade and cultural exchanges between China and Europe.

In early history, The Silk Road was the most important trade route,     3     (mark) the beginning of globalization. As the first route     4     introduced the Eastern world to the Western civilization, the Silk Road in China can date     5     the Han dynasty in ancient China. In the following years in history, many great figures had made significant     6     (contribute) to the development of the Silk Road.

Though the Silk Road was mainly a trading route, it was     7     (benefit) to each other in the first place. It     8     (actual) made great attraction to the development of the civilization of the world, opening long-distance political and economic communication between Europe and Asia. The ancient Silk Road is more like a historical textbook, enabling people from different cultures and regions     9     (comprehend) what happened during the ancient time. Up to now, the Silk Road in China     10     (bring) great attraction to the tourism in China even in the world.