No one knows how large          universe is， but          man has never given up the  attempt to explore new stars and new planets.

A. the；/           B/; the               C/：/             D the； the

. No one knows how large           universe is， but           man has never given up the  attempt to explore new stars and new planets.

A. the；/           B/; the         C/：/       D the； the

No one knows how large          universe is， but          man has never given up the  attempt to explore new stars and new planets

1. A.
   the；/
2. B.
   /; the
3. C.
   /：/
4. D.
   the； the

No one knows how large           universe is， but           man has never given up the  attempt to explore new stars and new planets.

A. the；/            B/; the                C/：/             D the； the

No one knows how large           universe is， but           man has never given up the  attempt to explore new stars and new planets.

A. the；/            B/; the                C/：/             D the； the