As many people know, Russians were the first to send a man ________.
A.out of spaceB.out of the spaceC.into spaceD.into the space在线课程C
名词space可有两种不同的含义：
1) that in which all objects exist and move空间；太空．space在此为不可数名词，一般情况下不与定冠词连用．
2) interval or distance between two or more objects(二物或多物之间的)间隔；距离．在这一词义上，space可用作可数名词，也可用作不可数名词．另外space还可用来表示一段时间．