Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.
A.into; from | B.towards; towards |
C.out of; from | D.through; through |
推荐套卷
Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.
A.into; from | B.towards; towards |
C.out of; from | D.through; through |