EXERCISES: I. Find a mistake in the four underlined parts of each sentence and correct it. 1. My sister had worked in the bank for five years before she had been seen to Da Nang. A B C D 2. Tom said that he had been very excited visiting Ha Long Bay for the first time in 2005. A B C D 3. The country has significant changed since we came here in 2007. A B C D 4. All of us are astonished that life in the countryside to improve a lot. A B C D 5. By the time she left the shop, she spent all of her money on clothes. A B C D II. Put ever, never, for or since into each gap to complete the sentences. 1. I’ve known him _____ over ten years, but I’ve ________ met his parents. 2. We haven’t had a barbecue _______ last summer. Have you _______ had a barbecue? 3. His wife, Carrie, is a designer. She has her own studio ________six months, _____ 8th June. 4. My uncle has been at my house ____ ___ 8.00 this morning. Have you ______ met him? – No, _______. 5. I’ve known him _____ ages, but I’ve seen him _______ I was at university. 6. Sue has lived in London________ the last few years but she’s ________ gone to Big Ben. Have you ________ gone there? 7. I’ve seen Keith ______ Christmas. 8. She’s been in China_______ a long time, but she’s _______ visited the Great Wall. 9. He’s worked for this company _______ many years, _________ 1976, I guess. 10. We’ve been friends_______ we were children, and I’ve _____ liked anyone as much as I like him. III. Complete the passage with the correct form or tense of the words in the brackets. Television first (1)___________ (appear) some fifty years ago in the 1950s. Since then, it has (2)_________ (be) one of the most popular sources of (3)(entertain)__________ for both the old and the young. Television can (4)______________(actual) satisfy almost all kind of taste. It offers cartoons for children, world news, music and many other programs. If someone (5)_____________(interest) in sports, for example, he can just choose the right sports channel. There he can enjoy a broadcast of an (6)_____________(nation) football match while it is actually happening. Television is also a very (7)___________( use) way for companies to advertise their products. It is not too hard for us (8)__________(see) why there is a TV set in almost every home today. And, engineers are developing (9)____________(interact) TV which allows (10)________________(communicate) between viewers and producers. làm giúp nha mn