Question

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

Answer 1

C

该题考查冠词的用法。本题中space是不可数名词，此前不可加冠词；need是可数名词，此处表示泛指，所以要用不定冠词。因此该题最佳答案是C。