They ______Hong Kong twice.
#63785
A
have gone to
B
have been to
C
have been in
D
have gone in
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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
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
Kate ________ on her new novel, which is supposed to come out next month.
#63761
A
was working
B
had worked
C
will be working
D
has been working
We complained to the travel agency about the horrible service during our trip，but no one has________by now.
#63750
A
responded
B
deserved
C
recovered
D
survived