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Check the meaning of the words in the box. Then read and complete the text with the words from the box. Listen and check. (Kiểm tra nghĩa của các từ trong hộp. Sau đó, đọc và hoàn thành văn bản với các từ trong hộp. Nghe và kiểm tra.)
The USA invented the Global Positioning System (GPS) in the 1970s. At first, it was a military project, but now anyone can use the system to find out exactly their locations, and (1) their movements.
For GPS to work, your (2) (or smartphone) must be in contact with four or more satellites in space.
Then it uses the data to calculate the exact time and position on Earth. However, it is not enough for survival situations (escaping the jungles or deserts) because you must know your direction (which way you are moving) and your (3) (how fast you are moving). GPS provides this information, by tracking your position over time.
For modern explorers, a smartphone and GPS are as important as a compass, torch and map. With the right (4), your smartphone will help you survive.
Read the text quickly. The following words may be new to you. What do you think they mean? Compare your ideas with a partner's (Đọc nhanh văn bản. Những từ sau đây có thể là mới đối với bạn. Bạn nghĩ chúng có nghĩa là gì? So sánh ý tưởng của bạn với ý tưởng của một người bạn)
Can I become a bodybuilder?
Yes, you can. You should practise bodybuilding regularly and have a good diet like this:
• Breakfast: scrambled eggs, and vegetables
• Snack: whey protein shake, soft-boiled eggs
• Lunch: grilled chicken breast, mixed greens, and baked sweet potato
• Snack: hard-boiled eggs and carrot sticks
• Dinner: fish, green beans with brown rice
Just follow our instructions and you won't look different from a famous bodybuilder.
Can I jump as high as NBA stars?
No, you cannot if you do not eat as many calories as them. A basketball player needs between 2.500 and 5,000 calories per day. Bananas contain helpful nutrients that make the body feel full of energy. Each banana, on average, contains 30g of carbohydrates, and about 0.01g of vitamin C. Especially, bananas are a rich source of potassium, about 0.4g of each. Potassium reduces a sudden pain in muscles. That is why a wise basketball player often enjoys a banana before or during the game.