1 . 阅读下面短文，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Nowadays, mushroom hunting is becoming more and more popular in many parts of the United States.

Mushroom hunters spend hours, even days, in wooded areas     1    (search) for wild mushrooms. They say mushroom hunting has changed their relationship with the environment.    2    (find) mushrooms, they must walk slowly. So, they get a chance to see the birds, the trees, little animals' life and everything.     3    is necessary to pay close attention to the     4    (detail) on trees and on the ground.

Experts say eating mushrooms     5    (be) good for health. Mushrooms contain the mineral selenium (硒). It     6    (contain) in most fruit and vegetables, too. This mineral helps the liver to work     7    (proper). The mineral also helps to prevent infection in the body and may decrease the)    8    (grow) of cancer tumors (肿瘤). Mushrooms,     9    are high in fiber may help us to lose weight. So, we eat much     10    (little) because they can make us feel full for longer periods.