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Bài 1 Viết công thức hóa học và tính phân tử khối của chất sau: a.Khí lưu huỳnh trioxit, biết trong phân tử có 1 S va 3 O liên kết với nhau b.Sắt (3) clorua, biết trong phân tử có 1Fe và 3 CL c.Kali sunfat, biết trong phân tử có 2K, 1 S và 4 O d.Canxi photphat biết trong phân tử có 3 Ca , 2 P và 8 O
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Ex 8. Choose the word which best fits each gap. Many people (1) __________ crafting with paper. The materials are readily available and don't cost much; and no super special talents is needed. Anyone (2) __________ be a paper crafter. There are many different paper craft techniques. Origami is one of ancient techniques developed in Japan where squares of paper are (3) __________ and formed into various objects such as flowers, animals, and boxes. Card (4) __________ is also a favourite paper craft technique. Birthday cards are the most popular greeting cards, followed by Christmas cards. Receiving a (5) __________ card is a special gift, because of the time and effort someone spent making it. It lets the recipient know just how much you care (8) __________ them. 1. a. enjoy b. decide c. want d. learn 2. a. must b. should c. can d. will 3. a. wrapped b. folded c. torn d. taken 4. a. making b. doing c. changing d. receiving 5. a. handmake b. handmaking c. handmade d. making hand 6. a. in b. on c. over d. about Ex 9. Read the text carefully, then answer the questions. My name’s Susan. I have two favourite hobbies. My first hobby is reading. I started to do it when I was four years old. The first time I did it, I felt interested. So I kept reading. I enjoy reading because it can make me relaxed and calm. Moreover, it can give me an imagination, so I can write books in the future. I can learn the different cultures and customs of other countries in the world, too. My second hobby is gardening. I have made a small garden and planted many beds of flowers. In the spring season, my garden is full of beautiful flowers. I have a separate plot for vegetables - carrots, potatoes, etc. In the evening, I water the plants and remove the weeds. I love sitting in my garden and reading my books. It is very pleasant to be there! 1. What are Susan’s hobbies? __________________________________________________________________ 2. When did she start reading? __________________________________________________________________ 3. How did she feel when she first read a book? __________________________________________________________________ 4. Why does she enjoy reading? __________________________________________________________________ 5. What has she planted in her garden? __________________________________________________________________ 6. When does she water plants? __________________________________________________________________ Ex 10. Write sentences, using the cues given. 1. I/ enjoy/ play/ sports/ because/ it/ good/ health __________________________________________________________________ 2. your children/ go/ camp/every summer holiday? __________________________________________________________________ 3. I/ think/ photography/ can/ expensive hobby __________________________________________________________________ 4. my cousin/ give/ me/ book/ gift/ next birthday __________________________________________________________________ 5. he/ find/ mountain climbing/ dangerous/ so/ he/ not take/ it __________________________________________________________________ 6. I/ hope/ the future/ he/ teach/ me/ how/ do/ eggshell carving __________________________________________________________________

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