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angeltapsu
2 năm trước
Một hỗn hợp X gồm Fe2O3, FeO và Al2O3 có khối lượng là 42, 4g khi Cho X tác dụng với CuO dư nung nóng người ta thu được 41, 6 gam hỗn hợp chất rắn Y và hỗn hợp khí gồm CO vàCO2 khi cho hỗn hợp khí này qua dung dịch baoh2 dư thì thu được m gam kết tủa khối lượng kết tủa là bao nhiêu
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II. Insert a/an/ the if necessary. 1. My birthday is on _______ next Sunday. 2. It doesn't often snow here at ______ Christmas. 3. We came here in ______ summer of ______ 1969. 4. - Are you doing anything at ______ weekend? - I don't think so. - Well, come over on ______ Sunday. 5. Rita plays ______ violin and her sister plays ______ guitar. 6. On our trip to ______ Spain, we crossed ______ Atlantic Ocean. 7. David attended ______ Princeton University. 8. ______ Florida State University is smaller than ______ University of Florida. 9. ______ chair that you are sitting in is broken. 10. ______ Civil War was fought in ______ United States between 1861 and 1865. 11. ______ big books on ______ table are for my history class. 12. A: Do you take ______ sugar in coffee? B: I used to, but now I'm on ______ diet. I'm trying to lose weight. 13. The British Prime Minister live in _______ Downing Street. 14. _______ skiing is my favourite sport but I also like _______ swimming. 15. Pigeon is the symbol of _______freedom.

Circle the best answer A, B, C or D to complete the sentences. 1. How many people took part……………the contest? A. in B. from C. with D. to 2. I am better……………English than Nam. A. than B. with C. at D. for 3. You will not pass the exam……………working harder. A. unless B. without C. if D. although 4. It was raining very……………so I had to wear my raincoat. A. wet B. bad C. hard D. heavy 5. Mr Dung said he……………35 the following week. A. was B. is C. will be D. would be 6. I wish I……………to him. Now it’s too late. A. listened B. has listened C. had listened D. would have listene 7. What is……………, a dog or a cat? A. intelligent B. more intelligent C. as intelligent D. the most intelligent 8. There is too much traffic, …………… the air is polluted. A. however B. so C. moreover D. although 9. If a disaster …………… in an area, people from other areas will offer help. A. happens B. will happen C. happen D. happened 10. Be …………… ! He is looking at you. A. care B. careful C. carefully D. carelessly 11. I was very …………… that you won the first prize. A. amazed B. amaze C. amazement D. amazing 12. We are …………… in learning English. A. interest B. interesting C. interestingly D. interested 13. We stayed at home …………… it rained heavy. A. and B. because C. so D. but 14. She looks very …………… today. A. happen B. happiness C. happily D. happy 15. The river near my house is …………… A. pollutant B. polluted C. pollute D. pollution IV. Put the verbs in brackets into the correct form. 1. His hair is short. He (have) ……………….……….his hair cut yesterday. 2. My father told me (not stay) ……………….……….up too late. 3. She wishes she (be) ……………….……….better tomorrow. 4. The rooms in this hotel (clean) ……………….……….every day. 5. When I met him, he (talk) ……………….……….to his friends in the bookstore. 6. It’s ages since I last (have) ……………….……….. Chineses food. 7. My car (repair) ……………….………..yesterday. 8. Your house (rebuild) ……………….………..next year? V. Supply the correct form of the words in brackets. 1. She looks……………….………..in her new dress. (attract) 2. Old people often have……………….………..in breathing. (difficult) 3. How……………….………..of you to break that glass! (care) 4. Some of my……………….………..live in a village outside Thanh Hoa city. (relate) 5. The house is large but it is terribly ……………….………..to live in. (comfort)

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