1 . As is known to us, the People’s Republic of China came into ________ (exist) as an independent country in 1949. (所给词的适当形式填空)

2 . They ________ on food supplied by the organization which came into ________ decades of years ago. (exist) (所给词的适当形式填空)

3 . To people who are used to the limited choice of apples such as Golden Delicious and Royal Gala in supermarkets, it can be quite an eye opener to see the range of classical apples still in ________, such as Decio which was grown by the Romans. (exist)（所给词的适当形式填空）

4 . Global warming is threatening the _____________ (生存) of wild animals. (根据汉语提示单词拼写)

5 . They exist on food supplied by the organization which came into ________ (exist) decades of years ago.（所给词的适当形式填空）

6 . French scientist Marie Curie announced the_____ (存在) of the element radium(镭). （根据汉语提示单词拼写）

7 . Up to now, more than 360 acupuncture points have been identified, each linked to a different part of the body.

A．made a switch

B．discovered or noticed its existence

C．discussed sth. before making a decision

8 . The research has led scientists to guess the e_____ (存在) of other galaxies. (根据中英文提示填空)

10 . So far, he has collected enough evidence of the wild man’s __________ (exist). (所给词的适当形式填空)