The Netherlands needs thousands of new houses because the country 1 (have) a growing population. Anyway, it may not have to build all those houses. Some of 2 (they)can be printed.
3 (recent), the government has been working together with a university and some building companies(公司)to build houses that are fully 3D⁃printed. As volunteers, an old couple has become the first people in Europe to move into such 4 house.
With two 5 (bedroom) and a big living room, the house was built layer(层)by layer,using a huge 3D printer and special cement(水泥). After being printed out, the house 6 (carry) by a truck to the building site, and a roof(屋顶)and windows were later added. It took around 120 hours 7 (finish) this 3D⁃printed house. Usually, it takes about one or two years to build a house in the 8 (tradition) way.
The couple will live 9 this house for six months, with a monthly pay of 800 euros(欧元). The cost seems a little bit high, but they think it is much cheaper 10 living in the hotel.
答案解析：
1. has 句子描述的是客观事实，即荷兰因为人口增长需要数千套新房子，所以用一般现在时。主语“the country”是第三人称单数，谓语动词要用第三人称单数形式，“have”的第三人称单数形式是“has”。
2. them “of”是介词，后面接人称代词时要用宾格形式。“they”的宾格是“them”，这里指代前面提到的“thousands of new houses”。
3. recently 此空需要一个副词来修饰整个句子，表示时间。“recent”是形容词，其副词形式是“recently”，意为“最近”，放在句首，首字母大写。
4. a “such a/an + 可数名词单数”是固定结构，表示“如此……的一个……”。“house”是可数名词单数，且“house”以辅音音素开头，所以用“a”。
5. bedrooms “two”表示数量“两个”，后面接可数名词复数形式。“bedroom”的复数形式是“bedrooms”。
6. was carried 根据语境可知，房子是被卡车运到建筑工地的，要用被动语态。句子描述的是过去发生的事情，用一般过去时的被动语态，其结构是“was/were + 过去分词”。主语“the house”是第三人称单数，所以用“was”，“carry”的过去分词是“carried”。
7. to finish “It takes sb. some time to do sth.”是固定句型，意为“做某事花费某人多长时间”，其中“it”是形式主语，真正的主语是后面的动词不定式。所以这里用“to finish”。
8. traditional 此空需要一个形容词来修饰名词“way”，表示“传统的方式”。“tradition”是名词，其形容词形式是“traditional”。
9. in “live in + 地点”表示“居住在某地”，是固定搭配，所以这里用“in”。
10. than 根据语境可知，这对夫妇认为住在这个房子里比住在酒店便宜得多，这里是比较级，“much cheaper”后面要用“than”来引出比较的对象。
