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Viết 6 PTHH khác nhau cho mỗi trường hợp: SO2 là chất tham gia SO2 là chất sản phẩm
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Exercise 1: Read the following passage and decide which answer (A, B, C or D) best fits each space. I don’t believe in ghosts! Last year I stayed for a few days in an old house in Scotland which was famous for its ghost. I don’t really believe in ghosts, so I’m not afraid of them of course. So when my hosts suggested (1)________ up all night to see their ghost, I simply laughed at them. Then they told me about the woman who haunted their house. She had been accused (2)________ murdering her husband in the eighteenth century because she had been jealous of him, but she had avoided (3)_________tried, and had disappeared. She appeared quite regularly, walking through the house as if she was searching for something. I agreed to watch that night, although it would (4)_________ sitting for hours in the cold. I expected one of my friends to appear dressed as the ghost, and so when the figure of a woman finally came towards me, I (5)_______to be terrified. You can imagine my surprise when the figure took a knife from her dress, and then vanished. I decided to disappear myself, and drove home to London as quickly as I could. 1. A. walking B. getting C. staying D. coming 2. A. that B. of C. for D. while 3. A. and B. being C. but D. having 4. A. mean B. be C. have D. uncomfortable 5. A. wanted B. imagined C. pretended D. supposed Exercise 2: Read the following passage and decide which answer (A, B, C or D) best fits each space. Holidays Is it better to go on a package tour, or to travel on your own? I suppose the answer depends on what kinds of (1) _________ you are. A complicated tour organized by a travel agent has some advantages. You have an itinerary, which give you definite departure (2) _________ arrival dates, and a list of all your destination. The accommodation may be cheaper, as it has been (3)_________ in advance, so you spend less time worrying about where you are going to stay. If you book your own hotel, you might have trouble finding a/an (4) _________ , unless you are going to stay for a fortnight, for example. On the other hand, organizing your own trip can be fun. Many students hitch-hike or buy cheap train tickets, and (5)_________ the night in student hotel or guess-house. 1. A. voyager B. passenger C. tourist D. mover 2. A. and B. but C. or D. so 3. A. booking B. booked C. book D. to book 4. A. empty B. free C. vacancy D. available 5. A. have B. make C. do D. spend

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