Flood is one of the most terrible kinds of natural disaster which hurts or even kills people and animals. Floods can also damage houses, factories, public places, etc. Floods can be caused by a variety of factors, such as heavy rainfall, storm surges, or the overflow of rivers and lakes. When floods occur, they can inundate homes, businesses, and farmland, leading to significant economic losses and disruption of daily life. The impact of floods in Vietnam has been significant, with millions of people affected and billions of dollars in damage caused. There are some efforts to minimize floods. First, we must not cut down the trees in the forest illegally, because it can cause many disasters for human beings, one of which is flood. Second, We should plant any kind of trees in our house, in a barren area or on the side of the road, so the water can be absorbed easily by the root of the plants. To mitigate the impact of floods, it is important to invest in disaster preparedness and response measures. This can include early warning systems, flood-resistant infrastructure, and emergency response plans. Floods are natural disasters that can have significant social, economic, and environmental consequences. By taking proactive steps to mitigate their impact, we can help to protect communities and ensure a more resilient future.

Jane: Where did you go on your last holiday? 
Kaylin: I went to Hokkaido. It is in the northern part of Japan. 
Jane: Wow, that's great. I've never been to Japan. Who did you go with? 
Kaylin: I went there with my husband last month. We wanted to relax, and also go shopping. 
Jane: Sounds good! How long did you stay? 
Kaylin: We stayed there for almost six days. We booked a hotel online in advance. 
Jane: Isn't it expensive there? I've heard it's really expensive in Japan. 
Kaylin: It depends on which city you go to. In the northern part of Japan, it's not that expensive compared to Tokyo, for example. Tokyo is an expensive city. But I think that if you choose Airbnb, it's not that pricey. It's around 200 or 300 RMB per night. Airbnb is way cheaper than a hotel. 
Jane: Who makes travel decisions in your family? 
Kaylin: Sometimes it's me, and sometimes it's my husband who makes travel decisions. My friends suggested going to Japan and we decided to join them. 
Jane: Was that your first time in Japan? 
Kaylin: Well, we go to Japan twice a year. 
Jane: Twice a year? Wow, that's quite often. And why do you prefer to go to Japan that often? 
Kaylin: I like going to Japan because of the culture and the distance. It only takes us two hours to get there by plane. 
Jane: I see. Do you prefer visiting other countries or traveling in China? 
Kaylin: I prefer both. I think there are really beautiful places in China. For instance, Xinjiang and Xizang provinces are more beautiful than foreign countries. 
Jane: Are these places far from Shanghai? 
Kaylin: If you want to go to Xinjiang, it's a 5-hour flight, and to Xizang, it's a 3-hour flight. Yes, it's far from Shanghai. 
Jane: Actually, Japan is closer to Shanghai. 
Kaylin: Yeah, Japan and South Korea are closer to Shanghai. 
Jane: Have you been to South Korea? 
Kaylin: Yes, I went there in October last year. We have a long holiday in China at that time of the year because it's a national holiday. 
Jane: Which city did you visit? 
Kaylin: We went to Seoul, but I think it's not very tourist-friendly. I prefer going to Japan. 
Jane: If you compare Japanese and Korean cuisine, which one do you like more? 
Kaylin: Of course, Japanese food. 
Jane: Really? I've heard that a lot of people prefer Korean food more. 
Kaylin: Korean food is spicy to me. I think Japanese food is more delicious. 
Jane: What countries would you like to visit in the future? 
Kaylin: I want to go to Italy next year. I'm not planning to go anywhere this year. I would also like to visit Spain and the UK. In 2015, I went to Germany, the Netherlands, and France. 

... 

Jane: What do you need before you travel to another country? What do you need to prepare? 
Kaylin: It depends on where I'm going. If I choose Europe or the USA, I usually take some Chinese food with me. I don't like Western food. I'm Chinese, and I like rice and noodles. I went to the USA in 2016 and I didn't like their food. Even though there are Chinese restaurants in Europe and the USA, the food there is very expensive. 
Jane: So you went to the US last year? Which cities did you go to? 
Kaylin: I went to San Francisco, Las Vegas, and Los Angeles. To be honest, I like Europe more. 
Jane: What's the best way to find travel deals? How do you usually organize your trips? 
Kaylin: We always travel with my friends. One of us books the tickets, someone else books hotels, and another person finds information about food and local dishes. 
​Jane: That's a great idea. I think I should do the same next time I decide to travel. Do you prefer going on a package tour or a tour you organize and book yourself? 
Kaylin: I prefer to organize everything myself. If you choose a travel agency, it is more expensive than doing it yourself, and it is not that flexible. 
Jane: Yes, you're right. Do you usually travel with a lot of luggage or do you like to travel light? 
Kaylin: It depends on which country I'm going to. When I went to Japan, I bought some Japanese cosmetics. 
Jane: Great. So was it expensive? 
Kaylin: It depends on the brand. Local brands are not very expensive. 

... 

Jane: What kind of holidays do you like? Do you like warm or cold weather? 
Kaylin: I like summer holidays. Holidays for me are just for relaxing, spending time with my family, and shopping as well. 
Jane: Have you had any bad experiences when traveling? 
Kaylin: Well, I think Korean people are not very nice and friendly, and I find their food a bit expensive. In Thailand, for instance, people are friendly, but I don't like their tipping culture. You always need to leave a tip. It's the same in the USA. 
Jane: In China, you don't leave a tip, right? 
Kaylin: Yes, there are no tips. 

Đáp án đúng là: A

1. A
2. C
3. D
4. A
5. C
7. C
8. A
9. A
10. C
11. B
12. B
13. D
14. D
15. D
16. A
17. C
18. D
19. D
20. C
 

They have moved to this city since last Monday.

Dạng hiện tại hoàn thành 

S + have / has + v III + O

Tóm Tắt
F1=650N
S1=0.75Km=750m=S2
t1=9p=540s
F2=480N
t2=12p=720s
Giải
Công suất của người thợ thứ nhất là:
   P=A1/t1=\(\dfrac{650.750}{540}\)=902.777777778(W)
Công suất của người thợ thứ hai là:
   P=A2/t2=\(\dfrac{480.750}{720}\)=500(W)

Cùng với thành tựu kinh tế - xã hội – văn hóa và giáo dục, Liên Xô cũng đạt được những thành tựu lớn về quan hệ ngoại giao. Cụ thể:

- Từng bước thiết lập quan hệ ngoại giao với một số nước láng giềng ở Châu Á và châu Âu:

     + Trong 4 năm đặt quan hệ ngoại giao với: Đức, Anh, I-ta-li-a, Pháp, Nhật Bản.

     + Đầu năm 1925, Liên Xô chính thức thiết lập quan hệ ngoại giao với trên 20 quốc gia.

     + 1933: Mỹ công nhận và thiết lập quan hệ ngoại giao với Liên Xô.

- Ý nghĩa:

- Phá vỡ chính sách bao vây, cô lập về kinh tế và ngoại giao của các nước đế quốc.

- Khẳng định uy tín của Liên Xô trên trường quốc tế.