The old couple who _______ in the deserted house for ten years have been settled in a nursing home now.
#100554
A
lived
B
have lived
C
had lived
D
have been living
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My family plans to move into the building that is      over there now.
#101483
A
being built
B
building
C
to be built
D
been built
---The window is dirty.---I know. It ______ for ages and I’m considering giving the task to our children.
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A
hasn’t cleaned
B
hasn’t been cleaned
C
wasn’t cleaned
D
didn’t clean
Computers          in offices and homes since 1970s.
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A
have been used
B
had been used
C
was
D
has been used