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tranvanhung1505
2 năm trước
bằng phương pháp hóa học hãy nhận biết các dd mất nhãn saU NaNO3, NaOH, Na2CO3,NaCl
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Exercise 1: Put the verbs in brackets into the correct form: If I see him , I _____ (give ) him a gift. If I had a typewriter, I _____ (type) it myself. If I had known that you were in hospital, I _____ (visit) you. You could make better progress if you _____ (attend) class regularly. If I _____ (know) his telephone number, I’d give it to you. If you _____ (arrive) ten minutes earlier, you would have got a seat. If he worked more slowly, he _____ (not make) so many mistakes. I shouldn’t drink that wine if I _____ (be) you. If I _____ (find) a cheap room, I will stay a fortnight. A lot of people _____ (be) out of work if the factory closed down. Exercise 2: Make conditional sentences: Keep silent or you’ll wake the baby up. →If ……………………………………………..…..……… Stop talking or you won’t understand the lesson.→ If …………………………………….....….……. I don’t know her number, so I don’t ring her up.→ If …………………………………….....….…….. I don’t know the answer, so I can’t tell you.→ If …………………………………………….……….. We got lost because we didn’t have a map.→ If …………………………………….……..…….…… Susan felt sick because she ate four cream cakes. →……………………………………………..…… Without this treatment, the patient would have died. →……………………………………….….…... He lost his job because he was late every day. →………………………………………………...…… Peter is fat because he eats so many chips. →……………………………………………………...….. Robert got a bad cough because he started smoking cigarettes. →………………………………..…..

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