Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.
#76704
A
into; from
B
towards; towards
C
out of; from
D
through; through
推荐题目
Chang’e2 did many experiments, ______ I think are of much help for knowing space.
#76050
A
which
B
what
C
when
D
where
Occasions are rare _____________ I can spend a whole day with my daughter.
#76014
A
that
B
where
C
when
D
which
The reason _____he was absent was _____ he was ill and unable to go to school.
#76188
A
which; that
B
why; because
C
which; because
D
why; that
Too much fishing may harm fish population to the point________they can’t recover.
#78396
A
what
B
which
C
there
D
where