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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Because of the bad weather, my mother ____ and lay in bed. She ______ for a week. 
#63793
A
has been ill; was ill
B
fell ill; has fallen ill
C
fell ill; has been ill
D
fell ill; is ill
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
 Tom ________ in the library every night over the last three months.(2011·北京)
#63775
A
works
B
worked
C
has been working
D
had been working
Mary said that she  ___________ London.
#63780
A
has never gone to
B
has never been ,to
C
had never been to
D
had never gone to