Question

阅读理解

　　In America the red barn (粮仓) has been a familiar sight since the early 1800s.But why have been barns always keen painted red? Why not green or blue or yellow?

　　A painted barn was an unusual sight before the 1800s, because paint was considered an unnecessary expense. Then farmers realized that exposure (曝露) outside harmed wooden buildings. Thus barn painting began.

　　To save money, most farmers mixed paint from materials already on hand. A mixture was usually made from milk, lime (石灰)and glue (胶) made from cow's hooves (蹄). To add colour, they tried something like animals' blood, roots, and grasses. None of those materials, however, successfully coloured the paint.

　　Eventually (偶尔) one farmer used iron oxide (氧化物) , and it worked. Iron oxide made the paint reddish-brown. Thus, the red paint was born.

　　Later scientists discovered that the color red absorbed (吸收) the sun's rays. That kept the barn cooler in summer and warmer in winter. Today cooling and heating systems have made the color red less important for barns, but barns are still often red. They have become a farm tradition (传统).

1．Red barns were hardly seen in the USA ________.

[　　]

A．in the early 1800s

B．after the 1800s

C．before the 1800s

D．since the 1800s

2．At first barns weren't painted, because farmers thought it ________.

[　　]

A．too difficult

B．unnecessary

C．cost too much

D．none of above

3．Farmes tried coloring their paint with ________.

[　　]

A．milk, lime and glue

B．water, glue and lime

C．animal blood, roots and grasses

D．iron oxide

4．Scientists discovered that red was a good color for barns because ________.

[　　]

A．it absorbed the sun's rays

B．it kept a barn cooler in summer and warmer in winter

C．it kept hanks away from the farm animals

D．both A and B

5．The best title of this passage is ________.

[　　]

A．Why American barns are often red

B．American barns

C．Clever farmers

D．Good color red

Answer 1

答案：C;B;C;D;A