Ⅰ.单句语法填空
1．She was a famous nuclear __________ (physics)，who made many important discoveries.
答案： physicist
2．We live in a __________(globe) village，but this doesn’t mean that we all behave in the same way.
答案： global
3．Students should find more time to get close __________ nature which can encourage their creativity.
答案： to
4．Modern scientists believe that the universe came into __________ (exist) about 15 billion years ago.
答案： existence
5．The __________ (biology) thinks that some plants in this area are in danger of extinction.
答案： biologist
