It’s been over a year since I ______ back from the countryside.
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A
come
B
came
C
will come
D
had come
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Hundreds of jobs ______ if the factory closes. 
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A
lose
B
will be lost
C
are lost
D
will lose
 No one _______ the building without the permission of the policeman.
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A
is leaving
B
will be leaving
C
has left
D
is to leave