Chinese scientists have produced an embryo of a giant panda through cloning technology,_____ is a breakthrough ______ could save the endangered animals.
#67247
A
that; which
B
which; that
C
which; what
D
that; what
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He didn’t put the things ______ they belonged, for ______ reason he got his punishment.
#67644
A
which; that
B
what; this
C
that; whose
D
where; which
________ is where he gets all his money from. 
#69169
A
What I can’t understand it
B
That I can’t understand
C
What I can’t understand
D
Which I can’t understand it
Not until the child fell asleep_______leave the room. 
#72153
A
did the mother
B
does the mother
C
was the mother
D
is the mother