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ài 2: Bằng phương pháp hóa học. Hãy nhận biết các dung dịch đựng trong các lọ mất nhãn: NaCl, NaBr, NaI, HCl, H2SO4 , KOH
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Giúp em vs I. Choose the best answer: 1. Our team wơn the game because they played very ( well/good/bad) 2. His parents are always proud ( on/of/about ) him. 3. She asked her children ( stop/to stop/stopping ). 4. I know you worked really ( hard/hardly/good ) this semester. II. Fill in the blank with the correct form of verbs: 1. Mai has enough money ( buy ) ..... a new bicycle. 2. Hoa often ( do ) .....the homework after school. 3. Look! A baby ( cross ) .....the road. 4. I need ( buy ).....some notebook. III. Complete the sentences with right prepositions: 1. Are you interested......studying English? 2. When did you see him?.......lunch today. 3. Does it rain......spring? 4. His birthday is.......May 1st. 5. I am different.....my sister. IV. Combine each pair of sentences, using ENOUGH 1. Don't sit in the garden. It isn't warm. 2. He is intelligent. He can answer all the questions. 3. He is good. He will pass the examination. 4. The book is small. I can put it in my pocket. 5. Those shoes are large. He can wear them. V. Turn into reported speech: 1. The teacher said to his students, " You should learn harder for the exam." 2. " Please lend me your dictionary, Quang, " said Hoa. 3. " Can you help me with my homework? " Mình said to her sister. 4. " You should practice speaking English everyday, " the teacher said. 5. " You shouldn't translate each sentence into Vietnamese, " my brother told me.

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