My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment. 
#63787
A
taken off
B
taken down
C
taken up
D
taken away
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I know little about the accident because not much ______ about it up to now.
#63758
A
has said
B
has been said
C
had said
D
had been said
His uncle went abroad in 2010, and _______since.
#63782
A
has not been heard of
B
had not been heard of
C
had not heard of
D
has not heard of