The collapse of the World Trade Centre  has put US economy in a difficult  ___________.
#4935
A
occasion
B
case
C
situation 
D
background
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Tom !  You _____on the phone just now, but you _____in.
#4552
A
wanted , were
B
are wanted , are
C
were wanted , weren’t
D
called , aren’t
Since Claire had become attached to Tony, the robot needed _______________.
#4523
A
to rebuild
B
to have rebuilt
C
being rebuilt
D
to be rebuilt