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Dẫn từ từ 8,4 gam hỗn hợp khí X gồm but-1-en và but-2-en lội chậm qua bình đựng dung dịch Brom, kết thúc toàn bộ phản ứng có m (gam) Brom bị mất màu. Giá trị của m là bao nhiêu?
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II. Writing: A. Rewrite the following sentences, using the suggestions: (1.5 p) 1. In the middle of our dinner there was a knock at the door. => While we …………………………………………………………………………………………… 2. 'I must have made a mistake in the calculations", said Mr. Forest. (admitted) =>……….…………………………….. ……………………………………………………………….. 3. 'What would you do if you were having a problem with grammar, Jane?' Anne asked.(reported speech) =>……….…………………………….. ……………………………………………………………….. III. Grammar and vocabulary: A. Choose the best answer to complete the following sentences: (1.5p) 1. Your friendship should be based on ……………….. trust. A. basic B. fragile C. mutual D. blind 2. Thanks to medical improvements, the ………rate in Newtown has recently decreased. A. death B. dead C. deaden D. deadly 3. Students must obey class ……………….. A. laws B. times C. conferences D. regulations 4. I have no ………..…. to his coming here. A. idea B. objection C. complaint D. protest 5. We often volunteer to work in mountainous areas to provide …………education for children A. the B. an C. a D. no article 6. People are not aware ………… the problem of overpopulation. A. of B. for C. at D. in B. Use the correct form or tense of the verbs in brackets: ( 1.5 p) 1. The police made him( open) ………………………………his luggage. 2. It’s no good (write)……………………….. to him. He never answers the letters. 3. It’s important for the figures (update) …………………………regularly. 4. (See)……………………………….that film twice, I didn’t want to see it any more 5.Mary ( not wear)………………….… her glasses at that time so she (not see) ……..…………… what color the man’s T-shirt was. C. Use the correct form of the words in brackets: ( 1 p) 1. We must limit population (grow)........................................because of our limited resources 2. Miss Lien explained the rules of the competition to the students very (enthusiasm)…………………… 3. We are very (gratitude)……………………….to our teacher for helping revising for the final exam. 4. The gap between (generational)……… ......................................is bigger and bigger IV. Phonetics: *Choose the word which is stressed differently from the others: (0.5p) 1. A. compete B. award C. represent D. encourage 2. A. loyalty B. apartment C. quality D. interest * Choose the word whose underlined part is pronounced differently: (0.5p) 3. A. honor B. horse C. house D. hospitable 4. A. enthusiasm B. mutual C. nephew D. rumour

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