1. 根据句意及汉语提示完成单词

1. （1） The young scientist is (怀疑的)about the theory raised by the authority.

3. （2） He stayed under water for two minutes，and then swam to the (表面)．

5. （3） She was so ill that it seemed(不可能的)that she would pull through.

7. （4） If we continue to destroy the countryside many more animals will become(绝种)．

9. （5） Many people were shocked by the idea that Man had (进化)from lower forms of life.

11. （6） He (暗示)that in fact your help was not welcome.

13. （7） At present the experts are still uncertain of skeleton's(尸骨)(身份)．