问题
选择题
Exploring ________space is exciting, yet dangerous. There is ________need for both robots and humans for space exploration.
A．the; a
B．a; a
C．/; a
D．/; the
答案
C
题目分析：句意：探索太空是令人兴奋的，然而也是危险的，太空探索即需要机器人也需要人类。第一空不填，space是抽象名词，第二空填a，There is a need for..“有…需求”，所以选C。