_______it not been for the free ticket, I would not have gone to the cinema.
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A
Were
B
Should
C
If
D
Had
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The scientists are urging that the chemical _____.
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A
is banned
B
should ban
C
be banned
D
must be banned
— What has happened to Tom ? — I don''t know . He ____ lost . 
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A
could get
B
might yet
C
can have got
D
may have got
The family ________ on time, but their car had a flat tyre on the halfway.
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A
would arrive
B
could arrive
C
must have arrived
D
could have arrived