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A. be weighed B. to be weighed C. to weigh D. weighed 2. __________more attention, the tree could have grown better. A. Given B. To give C. Giving D. Having given 3. The murderer was brought in, with his hands __________behind his back. A. being tied B. having tied C. to be tied D. tied 4. On Saturday afternoon, Mr. Green went to the market, __________some bananas and visited his cousin. A. bought B. buying C. to buy D. buy 5. Can39。 ride B. riding。 to ride D. to ride。 boiled B. watching。 form boiling D. having watched。 A: I’ve heard that London Underground is the best in the world. I would like to learn something more about it. Could you help me? B: With p__________. What kind of information would you like to know? A: What’s the reason for the London Underground ing into being? B.: During the first half of the 19th century, the train service in London was not well developed. Most trains into London only went to the distant b__________ of the city because building railways tracks into the city would have caused damage to many h__________ buildings. Many buses were needed to t__________ people to the city center. Thus the road was so busy that no one could travel anywhere. This situation led to the development of the underground system. A: How is the first underground train like? B: At the beginning, p__________ were transported in carriage without windows, which were pulled through the narrow tunnels by steam engines. A: Oh, I see. Could you go on telling me something about the development of the underground system? B: Ok. In 1868, the next section was opened in the south of London. In 1880s, with the development of new ways of digging, the City and South London Railway linked other places in London. But it was still i__________ to travel on these lines because each line was s__________ owned and many were very far from each other. Later a w__________ American businessman Charles Yerkes improved this situation by buying these lines and setting up the Underground Group. After that, the London Underground system was greatly improved. A: What’s the situation during the War? B: During World War II when London was b__________, many underground stations