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hien6000
2 năm trước
6,7g hả 2hidrocabon có cơ Pt là c3h4 và c4h6 qua 1 lượng dư dd agno3/nh3 thu được 22,75g kết tủa . Xđ % khối lượng, 2 hh khí trên
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Ex 1. Read the text and answer the questions (1.0 pt) Modern traffic lights are an American invention. Red-green systems were installed in Cleveland in 1914. Three-color signals were installed in New York in 1918. They used to be operated by hand from a tower in the middle of the street. The first lights of this type appeared in London, on the junction between St.James Street and Piccadilly, in 1925. Automatic signals were installed a year later. In the past, traffic lights used to be very special. In New york, some lights used to have a statue on top. In Los Angeles, the lights did not just change silently, but would ring bells to wake the sleeping motorists of the 1930s. These are gone and have been replaced by modern systems that are seen everywhere now. 1. When were red-green systems installed? …………………………………………………………………………………… 2. What were installed a year later? …………………………………………………………………………………….. 3. Did the lights in Los Angeles change silently? …………………………………………………………………………………… 4. Where should you cross the street? ……………………………………………………………………………………

I. Find one word that has different pronunciation from others. 1. A. books B. pencils C. rulers D. bags 2. A. read B. teacher C. eat D. ahead 3. A. tenth B. math C. brother D. theater 4. A. has B. name C. family D. lamp 5. A. when B. who C. why D. where III. Match. 1. What happened in the story? a. Because I’d like to write stories for children. 2. Why would you like to be a writer? b. He’d like to be a teacher. 3. Don’t touch the stove! c. Because you may get a burn. 4. Who is the main character in this story? d. First, the prince visited the castle and he met a beautiful princess. 5. What would he like to be in the future? e. It is Doreamon. Answer: 1 - 2 - 3 - 4 - 5 - IV. Rearrange these sentences. 1. fly/ because/ be/ would like/ Minh/ pilot/ to/ planes./ like/ he’d/ a/ to ______________________________________________________________ 2. should/ Mr. Tuan/ a/ take /rest/. ______________________________________________________________ 3. folk tales/ I/ because/ love/ each of them/ me/ gives/ in life./ a lesson ______________________________________________________________ 4. to/ often/ I/ cinema / my/ the/ free/ go/ time./ in ______________________________________________________________ 5. had/ Quan/ to/ the/ headache/ doctor/ because/ went/ he/ a/. ______________________________________________________________ V. Read and answer. My name is Hoang Anh. In my free time, I often go camping with my family. The camp is in the forest near Ba Na Hills. We go there by car in the morning. My father likes fishing in the stream. My mother likes cooking barbecue for us. My brother and I usually play hike-and-seek. It’s so fun. We return home late in the evening. We enjoy camping very much. 1. What’s her name? ______________________________________________________________ 2. What does she do in her free time? ______________________________________________________________ 3. What does her father like doing? ______________________________________________________________ 4. What does her mother like doing? ______________________________________________________________ 5. When do they return home? ______________________________________________________________ 6. Do they love camping? ______________________________________________________________ VI. Look at the pictures. Read and write one word for each gap. There is one example. example: She has a stomach ache. 1. He has a _______________. 2. She has a ______________ throat. 3. He should see the ________________. 4. She shouldn’t eat a lot of __________. VII. Write about their family and what they do in their free time. My name is ______________. There are four people in my family. I usually _____________________ in my free time. My mother is a/ an _____________, and she usually __________________________ in her free time. My father is a/an _________________. He often __________________ in his free time. My brother/ sister usually ___________________________. VIII Fill in the blank with the words in the box. Translate the story in Vietnamese (Điền những từ trong hộp vào chỗ trống. Dịch truyện sang tiếng Việt) got married First cruel ordered fell in love(phải lòng) Once upon the time, there was a beautiful girl named Tam. She lived with her father ,her step-mother and her sister,Cam in a small village.______, Tam’s father died. Her step-mother _______ her to do much housework. Tam was very upset. Cam was as ________ as her mother. She often made Tam be punished the mother. Then, one day, Tam met a King with the help of a fairy. The King _________ with her and he took her to his castle. Next, Cam and her mother found different ways to make Tam died but they failed terribly. In the end, Tam _________ to the King and lived happily ever after.

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