---Must I fill in the form?   --No, _______.
#87762
A
you must
B
there’s no need
C
you needn’t have
D
you needn’t to
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—— Must I take a bus ? —— No, you____. You can walk from here. 
#89947
A
must not
B
don’t
C
don’t have to
D
had better not to
We were delayed at the airport.Otherwise,we    here by lunch.
#86444
A
must have been
B
could be
C
should be
D
would have been
-----I thought I ______something burning  . -----Really?
#89834
A
smelled
B
was smelling
C
could smell
D
might smell