Question

As we all know, _______ mankind has realized the walk in ______ space.

A．the; the

B．/; the

C．/; /

D．the; /

Answer 1

C

本题考查冠词。mankind做“人类”讲时，是集合名词，可用单数或复数，用单数时不加a；space为不可数名词,作其义时,前不加冠词。选C。