X + 50 = 100 - 20

<=>x+50=80

=>x=80-50

=>x=30

Câu này mk gặp rồi nhưng ko biết làm

I. Đọc đoạn văn sau rồi điền một từ thích hợp vào chỗ trống. (1,5đ) Your head aches and you sneeze and (1)…cough…………. Your nose is all stuffed up, and it keeps running ,so you have to blow it every few minutes. You know by these symtoms that you have a (2)…cold………….. You feel very unpleasant. You are not sure if you will live through the day. Everyone may catch the …common……………cold at sometime or other . It isn’t……illness…….(4) serious illness, but people spend a billion dollars on different kinds of cold medicine every(5)…year……………. This medicine can relieve the (6)symptoms……..……….. It can make you cough (7)……less…………….., make your head less intense, and stop your nose running for a while. However, it can’t (8)cure……………..your cold. So far there (9)…is…………….no cure for the common cold. There is no medicine (10)…to……………cure it.

II. Đọc đoạn văn sau rồi điền một từ thích hợp vào chỗ trống. (1,5đ) The battle of Dien Bien Phu (0) ended the Indochina War. Today Dien Bien Phu is (1)____a_______tourist destination. Many visitors are battle veterans or members (2)__of_________their families. As (3)_well__________as visiting the battle site , tourists can enjoy the beautiful scenery of the Muong Thanh (4)__valley_________, visit the neighboring villages, and share the hospitality of the (5)___local________people. Most of the people who live in the area (6)____are_______members of Thai or H’Mong ethnic minorities. (7)____however_______, they do not depend on tourism (8)__alone_________to live. As Dien Bien Phu is only 30 kilometers from the Lao’s border, (9)___It________is an important trading center. Food leaves here for Laos and Thailand and goods arrive (10)______for_____the northern provinces of Vietnam.

V. Cho dạng đúng của động từ trong ngoặc để hoàn thành mỗi câu sau: (2 đ )
1. He prefers listening to music (watch)…to watching…….television.
2. He (live) …has lived…………in London for two years and then moved to Liverpool in 2010.
3. She gets fat because she always tastes things while she (cook) …cooks…………………
4. Bill decided (buy) ……to buy………………rather than a used one . 5. George is interested in (take)taking…………………………. an art class

6. Listen to those people ! What language are……….they (speak)………speaking…………..?
7. When I was small , I often (go) ……went………………..on bare foot .

8. Oh! this bag is very heavy . I can’t carry it . – Don’t worry , I (help) …will help…...……
you with it .

9. What would you like (eat)…to eat………………., Ba? – I like eating fish.
10. They bought a lot of food. They (have)……are going to have…….…………..………….a party tomorrow

IV. Điền dạng đúng của từ in hoa vào chỗ trống để hoàn thành mỗi câu sau: (1 đ )
1. Nobody likes him because his hair is always …untidy………….and dirty. TIDY
2. In Vietnam, one of the most popular…activities…………at recess is talking. ACT
3. She is a very …unpopular………………..singer. People don’t like her at all. POPULAR
4. This knife is ........useless............................ - It can’t cut anything. USE
5. Our students are going to have a …medical………………….check-up next Monday. MEDICINE
6. In the countryside, people often know all the people in their...……neighborhood………….. NEIGHBOR
7. You must be careful when playing video games because they can
be …addicted…………
ADDICT
8. I’d like a nice....juicy.......................orange JUICE
9. Edison’s most famous ……invention………………….... was the electronic bulb. INVENT
10. This dictionary is very ......useful..........................for you to learn English. USE