题目内容：
阅读下列短文，回答题。Uncle Li and Uncle Wang are good friends．They live next to each other and their farms are both at the foot of the mountain．So they can help each other．But neither of them likes to use his head．
They’re both poor though they work hard．Most villagers have built new houses，but they still live in low and broken houses．They don’t understand why they are still poor．
Once Uncle Li went to town to buy some medicine for his wife. In the town he heard the apples in a city were expensive. He told Uncle Wang about it as soon as he went back. They decided to carry some apples to the city. They borrowed some money from their friends and bought nearly 1,000kilograms of apples in the villages and carried them to the city on a tractor. Bad luck ! A lot of apples has already been carried there when they arrived. A few days later they had to sell them at a low price.
They felt unhappy and returned to their village.
"I can't understand why we always lose money while others always profit," Uncle Li asked one day.
"The tractor was too small" . Uncle Wang said without thinking. "We'll carry more apples on a truck next time ! "
"I agree!" said Uncle Li. "How foolish we were!"
Uncle Li and Uncle Wang live in low and broken houses because__________. A．they hope to save money
B．they're both poor
C．their farms are at the foot of the mountain
D．they're not far from their farms
参考答案：
答案解析：