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六、在空白处填入所给单词的适当形式。
When you think of 3D - printing, you may think of small objects. But three companies are working together 1 (print) something much bigger. They’re using a giant 3D printer to create what they say is the 2 (one) two - storey 3D - printed house in the USA.
3D - printing 3 (be) around for a while. But until recently, it hasn’t been used much for building houses. Now, that’s changing. Several 3D - printed houses have been built in the USA, and we 4 (plan) more. So far, no one in the USA has 3D - printed a two - storey house. This 3D - printed two - storey house will be a large 3 - bedroom house. Leslie Lok, who designed the house, says there are special challenges involved in printing a two - storey house with concrete(混凝土). One of 5 (big) is the size of the machine needed for the building. The 3D printer in Houston is massive(巨大的). It weighs over 12 tons. Ms Lok says printing the house 6 (take) the huge machine about 330 hours. That’s about eight normal work weeks.
But the team isn’t in a rush. Though it’s a two - year project, the actual printing 7 (not start) until last July. The house is now about halfway finished. They’re using the house as a “big laboratory” to learn more about 3D - printing houses. They want to see how the concrete reacts under different weather conditions. They also want to figure out how 8 (make) 3D - printing faster and cheaper. Currently, 3D - printing a house with concrete 9 (cost) more than building a house with wood. That’s partly because the technology is new. With time, the costs of 3D - printing houses will go down.
Ms Lok says that with 3D - printing, it’s easy to make each house different from other houses. That means that in the future, each house could be created 10 (special) for its owners. But if you want to move into a 3D - printed house, you’ll have to wait. This one has already been sold.
1. ________ 2. ________ 3. ________ 4. ________ 5. ________
6. ________ 7. ________ 8. ________ 9. ________ 10. ________
When you think of 3D - printing, you may think of small objects. But three companies are working together 1 (print) something much bigger. They’re using a giant 3D printer to create what they say is the 2 (one) two - storey 3D - printed house in the USA.
3D - printing 3 (be) around for a while. But until recently, it hasn’t been used much for building houses. Now, that’s changing. Several 3D - printed houses have been built in the USA, and we 4 (plan) more. So far, no one in the USA has 3D - printed a two - storey house. This 3D - printed two - storey house will be a large 3 - bedroom house. Leslie Lok, who designed the house, says there are special challenges involved in printing a two - storey house with concrete(混凝土). One of 5 (big) is the size of the machine needed for the building. The 3D printer in Houston is massive(巨大的). It weighs over 12 tons. Ms Lok says printing the house 6 (take) the huge machine about 330 hours. That’s about eight normal work weeks.
But the team isn’t in a rush. Though it’s a two - year project, the actual printing 7 (not start) until last July. The house is now about halfway finished. They’re using the house as a “big laboratory” to learn more about 3D - printing houses. They want to see how the concrete reacts under different weather conditions. They also want to figure out how 8 (make) 3D - printing faster and cheaper. Currently, 3D - printing a house with concrete 9 (cost) more than building a house with wood. That’s partly because the technology is new. With time, the costs of 3D - printing houses will go down.
Ms Lok says that with 3D - printing, it’s easy to make each house different from other houses. That means that in the future, each house could be created 10 (special) for its owners. But if you want to move into a 3D - printed house, you’ll have to wait. This one has already been sold.
1. ________ 2. ________ 3. ________ 4. ________ 5. ________
6. ________ 7. ________ 8. ________ 9. ________ 10. ________
答案：
1. to print 2. first 3. has been 4. are planning 5. the biggest 6. will take 7. didn't start 8. to make 9. costs 10. specially
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