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
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—What do you think of teacher，Bob?—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
#75578
A
where
B
which
C
when
D
that
The hottest continent, Africa has a lot of resources, ______ are still undeveloped.
#75744
A
many of them
B
many of whom
C
many of it
D
many of which
I was given three books on sewing, the first ______ I really enjoyed.
#77769
A
that
B
which
C
of which
D
of that
American women usually consider their best friends as someone ________ they can turn when in trouble.
#78134
A
to which
B
on whom
C
to whom
D
with whom