cho tam giác ABC là tam giác nhọn (AB<AC), đường cao AH.Gọi M,K,Q là trung điểm của BC,CA,AB a)chứng minh KQ là trung điểm của AH b)chứng minh MKQH là hình thang cân

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II. Supply the correct form of the words in brackets. 1. There are only 20 _______________ in my class. (study) 2. Some _______________students do drawings and paintings in the art club. (create) 3. The class is _______________; students do not stop talking to each other. (noise) 4. Your room is a _______________; please pick up your toys. (messy) 5. Every day, students learn English with English _______________teacher. (speak) 6. In the afternoon, they can join many _______________clubs. (interest) 7. My house is warm and _______________. (comfort) 8. Kids are not allowed to use _______________in math class. (calculate) 9. What is your _______________room, Tony? (favour) 10. I’m so _______________about my first day at school. (excite) II. Choose the best answer a, b, c or d to complete the sentence. 1. Don’t stand ________ the TV I’m trying to watch this programme. a.behind b. next to c. under d. in front of 2. You should never stand ________ a tree when it is raining, a.at b. under c. between d. on 3. My mother is in the ________ baking a cake for my birthday. а. bathroom b. dinning room c. kitchen d. bedroom 4. Please turn the ________ on. It’s so hot in here. a.fan b. light c. television d. faucet 5. The Tay and Nung people mostly live in ________ made of wood and bamboo. a. apartments b. stilt houses c. town houses d. villas 6. In our dining room, ________ four chairs and a table. We have breakfast there every morning. a. there is b. there are c. there isn’t d. there aren’t 7. ________ any children in the playground right now. a. There is b. There are c. There aren’t d. There isn’t 8. I like my bedroom best. It’s my ________ room. a. beautiful b. comfortable c. wonderful d. favourite 9. My room is so ________! Dirty clothes, toys, books are all over the floor! a. messy b. crazy c. tidy d. cozy 10. ‘Where do you live?’‘________’ a. On the floor. b. In the kitchen. c. In a town house. d. Next to the bookshelf.