TRAVEL SAFETY TIPS
1. (13) your plans and itinerary with a friend or family member.
2. Avoid carrying too much (14) with you to prevent attracting pickpockets.
3. Always keep your (15) and important documents secure.
4. Research local emergency (16) in case of any issues while traveling.

Last Saturday, my friends and I decided to go camping in the nearby forest. We packed our gear, checked the weather forecast, and made a list of all the supplies we’d need. _______________ .

a. When we arrived at the campsite, we excitedly set up our tent and started gathering wood for a fire.
b. After getting everything ready, we noticed we’d forgotten to bring any food except for a small bag of marshmallows.
c. As night fell, we shared the marshmallows, laughed at our mistake, and told ghost stories to pass the time.

There can’t be many people who are unaware of e-mail, even if they have never actually sent one. (19) there are some similarities between e-mail and letters, there are also many differences. The first is that e-mail is delivered instantly, so it can be a very effective means of (20) when speed is important. This speed means that e-mail is more practical for communicating over large distances. Another difference is that e-mail tends to be relatively informal. People are much more (21) to use language which they would consider unsuitable for a formal letter. Words spelled incorrectly in an e-mail are less likely to be checked than in a letter. One explanation for this is that (22) e-mail seems to be less permanent than something written on paper. We can be sure that the future development of e-mail will have all kinds of (23) effects on the way we (24) .

Almost all our energy comes from oil, coal, and natural gas. We call them fossil fuels. The earth's fossil fuels are running out. What will happen when there is no oil, coal and gas on the earth? Scientists are trying to find and use other alternative sources of energy. We can use energy from the sun, the wind, and the water. Solar energy is unlimited. The sun supplies all the energy used to grow plants, to evaporate water for rain, and to maintain the temperature of the planet. All are necessary for human life. If we are able to collect solar energy, we will be sure to have this abundant source of power.
Another source of energy from nature is the wind. Wind power is clean and plentiful. Energy from the wind has been used for centuries to move ships, grind grain, pump water and do other kinds of work. In more recent time, wind power has been used to generate electricity.
Water can also provide power. For a long time, people have used water to power machines. Some early uses of water power were to mill grain, saw wood and power machinery for the textile industry. Today water power is mostly used to generate electricity.

The Earth is home to countless natural wonders that showcase its incredible beauty and diversity. These breathtaking sites are found in every corner of the globe, attracting millions of visitors each year. One of the most famous natural wonders is the Grand Canyon in the United States, a massive gorge carved by the Colorado River over millions of years. Its towering cliffs and colorful layers of rock leave visitors in awe. (37) .
Another well-known natural wonder is Mount Everest, the highest peak in the world. Located in the Himalayas, it stands as a symbol of adventure and human determination. (38) . Climbing it is a dream for many, but it comes with great risks and challenges.
The Great Barrier Reef in Australia, the largest coral reef system in the world, is another marvel. Home to thousands of marine species, it is a vital ecosystem that must be protected from climate change and pollution. (39) .
Finally, Victoria Falls on the border of Zambia and Zimbabwe is one of the largest waterfalls in the world. Known as "The Smoke That Thunders," its roaring waters create a mist that can be seen from miles away. (40) .
These wonders remind us of nature's power and beauty, inspiring efforts to preserve them for future generations.

A. It is also a UNESCO World Heritage Site due to its ecological importance.
B. Many visitors are drawn to its stunning views and challenging terrain.
C. This natural wonder demonstrates the power of water and erosion.
D. These features make it one of the most famous landmarks on Earth.