Hiking is great fun. You will get close to nature and take exercise at the same time.A.

问题补充：

Hiking is great fun. You will get close to nature and take exercise at the same time.

A. a; the

B. a; /

C. /; the

D. /; /

答案：

A. a; the

B. a; /

C. /; the

(答案→)D. /; /

解析：这题考查冠词的用法：第一空不填，因为fun是不可数名词，第二空也不填，因为nature是抽象名词，选D。