Don’t worry too much about making mistakes. They are natural part of learning.A. /: aB.

问题补充：

Don’t worry too much about making mistakes. They are natural part of learning.

A. /: a

B. the;/

C. /; the

D. the; the

答案：

(答案→)A. /: a

B. the;/

C. /; the

D. the; the

解析： 考查冠词的用法，第一空为固定短语make mistakes犯错误，故不加冠词，第二空是泛指一部分，句意：不要太担心犯错误。他们是学习中很自然的一部分。故选A。