(补全单词)Canada is in N _____ America．

People live in different houses. You may know a wooden house or a paper house. But do you know a(n)    1   house?
In 2008, the first ice house in North America opens its    2   to welcome some visitors. The floors, windows and walls are all made of ice. It has ten bedrooms    3   twenty people can stay there each night. Visitors to the house    4   in ice beds, sit on ice chairs and eat from ice plates. Well, the toilets are not made of ice, of course.
It’s usually below zero so it is very    5   inside the house. However, do the visitors just sit there to    6   warm? No, visitors have to    7   special clothes. These can make    8  feel warm until morning.
Workers    9   about four weeks designing the ice house. Visitors can only stay in this ice house in winter. It isn’t    10   in hot summer. Because this house is so special, it is becoming popular with young people.

People live in different houses. You may know a wooden house or a paper house. But do you know a(n)  36  house?
In 2008, the first ice house in North America opens its  37  to welcome some visitors. The floors, windows and walls are all made of ice. It has ten bedrooms  38  twenty people can stay there each night. Visitors to the house 39  in ice beds, sit on ice chairs and eat from ice plates. Well, the toilets are not made of ice, of course. It’s usually below zero so it is very  40  inside the house. However, do the visitors just sit there to  41  warm? No, visitors have to  42  special clothes. These can make  43  feel warm until morning.
Workers  44  about four weeks designing the ice house. Visitors can only stay in this ice house in winter. It isn’t  45  in hot summer. Because this house is so special, it is becoming popular with young people.

People live in different houses. You may know a wooden house or a paper house. But do you know a(n)    1   house?

In 2008, the first ice house in North America opens its    2   to welcome some visitors. The floors, windows and walls are all made of ice. It has ten bedrooms    3   twenty people can stay there each night. Visitors to the house    4   in ice beds, sit on ice chairs and eat from ice plates. Well, the toilets are not made of ice, of course.

It’s usually below zero so it is very    5   inside the house. However, do the visitors just sit there to    6   warm? No, visitors have to    7   special clothes. These can make    8  feel warm until morning.

Workers    9   about four weeks designing the ice house. Visitors can only stay in this ice house in winter. It isn’t    10   in hot summer. Because this house is so special, it is becoming popular with young people.