In crowded places like_____airports and railway stations,you _______ take care of your luggage.
#89092
A
can
B
may
C
must
D
will
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Please open the window, _____?
#90215
A
can’t you
B
aren’t you
C
do you
D
will you
___________, he would have been fired. 
#88131
A
Had he lied to the boss
B
Did he lie to the boss
C
If he has lied to the boss
D
If he lies to the boss