Cho 18,4 g hỗn hợp gồm Fe và một kim loại a hóa trị 2 tác dụng với H2 SO4 loãng dư thì được 2,24 lít khí điều kiện tiêu chuẩnvà 12,8 gam chất rắn không tan. Hòa tan hoàn toàn phần chất rắn không tan bằng H2 SO4 đặc nóng đun nóng thì thợc 12,8g khí CO2 xác định tên của kim loại a

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III. Give advice with “should” or “shouldn’t”, using the words given in brackets. Example: You look very pale and terrible. (see a doctor) You should see a doctor. 1. You work until 11 every night. (not work so hard) @ ………………………………………………………………………………… 2.It's Mai's birthday on Saturday. I think we should do something. (buy her a nice birthday present) @ ……………………………………………………………………………… 3.The car did not start this morning. (take it to the garage) @ ………………………………………………………………………………… 4.Our train leaves at 6 o’clock tomorrow morning. (go to bed early tonight) @ ………………………………………………………………………………… 5.He always gives you the wrong advice. (not listen to him) @ ………………………………………………………………………………… 6.Everything will be all right. (not worry so much) @ ………………………………………………………………………………… 7.He doesn’t like this job because it’s so boring. (look for another one) @ ………………………………………………………………………………… 8.It’s so late to play music so loudly, we’ll wake up the neighbours. (turn it off) @ ………………………………………………………………………………… 9.Your hair is so long. (have a haircut) @ ………………………………………………………………………………… 10.He doesn’t understand the lesson. (meet the teacher after class) @ ………………………………………………………………………………… IV. You the following set of words and phrases to write complete sentences. 1. People/ decorate/ homes/ plants/ flowers. @ ………………………………………………………………………………… 2. .People/ try/nice/ polite/ each other/ because/ they/ want/good luck/ New Year's Day. @ ………………………………………………………………………………… 3.They/ visit/ relatives/ friends/ they/ exchange/ New Year's wishes. @ ………………………………………………………………………………… 4 .Many people/ go/ pagoda/ have/ happy year/ their family. @ ………………………………………………………………………………… 5.Tet/ a time/ fun/ festivals/ throughout/ country. @ …………………………………………………………………………………