第一部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分）
1.Not everyone has realized what_____important part the balance of ____nature plays in their life.
A．an；the B．/；the C．an；/ D．the；/
2. Einstein’s most famous theory is ______ we call the Theory of Relativity.
A.what B. that C. which D. why
3._____ to finish this composition in such a short time is a mystery.
A. How did he manage B. What did he manage
C. What he managed D. How he managed
