Electricity has always been around although it’s invisible! Scientists have worked with electricity for thousands of years. We’ve all heard of the famous ones such a【小题1】 Benjamin Franklin and Thomas Edison, but many other important inventors have been buried (埋葬) in history.

Back in ancient Greece, scientists began to study electricity. Over 2,000 years l【小题2】 in 1600, English scientist William Gilbert first used the word “electric” in a report.

In 1786, an Italian professor found that when he touched a dead frog’s leg with a knife, the leg started to shake! In 1792, a【小题3】 Italian scientist, Alessandro Volta, gave the correct e【小题4】 : the two different metals—the steel knife and the tin (锡) plate where the frog was lying—made the leg shake. Volta also invented the first battery.

In the late 19th century, British scientist Joseph Swan and American inventor Thomas Edison set up a company to p【小题5】 the first electric lamp. Before that, Edison invented a generator (发电机) and used it to provide e【小题6】 to light his lab. Later he lighted the first New York street with electric lamps in September 1882!   

When Edison’s generator was c【小题7】 to James Watt’s steam engine (蒸汽机), it became possible to produce a lot of electricity at last!

根据下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Vang Vieng is a small but beautiful town. It is one of the 【小题1】 (popular) places in Laos. Vang Vieng is warm all year round. Quite 【小题2】 few visitors come here to relax in winter.

However, many people like staying in Vang Vieng not just 【小题3】 of the weather. The town has beautiful mountains and a big forest. There is also Nam Song River around it. People can try interesting and exciting games on the river.

I clearly remember the days when I was in Vang Vieng. One day in July, my friends and I 【小题4】 (buy) some tickets for kayaking (皮划艇运动). We spent about two hours 【小题5】 the activity. Kayaking was fun, but it was not 【小题6】 (relax) all the time. I didn’t know how to control (控制) the boat sometimes. 【小题7】 (luck), my two friends and I were on the same boat. They controlled it well and we all had a good time.

After 6 p.m., the town was a little crowded. There were more and more people. We went into a restaurant near Nam Song River. It had the best service in town. We could ask for any help. There were more than 20 dishes in the restaurant. All of 【小题8】 (they) looked delicious so it was hard for us to make a choice (选择). We tried some special food there and had a good meal.

Later, we visited other great places in Vang Vieng. There were friendly people and enjoyable 【小题9】 (activity) everywhere. What a lovely town it was! I expect 【小题10】 (go) there once again.

Have you ever 【小题1】 (be) to Wuyuan? It is in the northeast of Jiangxi Province. People call it “the hometown of books”, “the hometown of tea” and “the 【小题2】 (beautiful) village in China”.

I 【小题3】 (go) there with my friends in April last year. We had a wonderful experience. With green trees and brooks (溪流) around, the ancient 【小题4】 (build) which were built during the Tang Dynasty caught my eyes. We also visited Changxi village, a place famous for 【小题5】 (make) green tea. People live 【小题6】 quiet and simple life there. They shared the tea culture with us and told us how to enjoy the fresh tea. Next we passed through the oldest lane (空中走廊) 【小题7】 (experience) the beautiful Rainbow Bridge. 【小题8】 it was built 800 years ago, it stands as strong as ever. So it is still in use by the villagers now. I really liked this bridge because it could protect people 【小题9】 getting wet on rainy days. 【小题10】 (final), we had a look at the Yuanyang Lake. It is in the west of Wuyuan and got the name of “Provincial Nature Reserve (省级自然保护区)” in 1997. Along the lake is a forest with about 185 kinds of plants that are green all year round.