Please do not feed the fish; they _____ die if they eat too much.
#63322
A
shall
B
must
C
need
D
may
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They       have got lost, or had an accident.
#62726
A
can
B
might
C
must
D
mustn’t
It is impossible to please everyone. We can only do our best.
#77859
A
hear…of
B
make… happy
C
know… well
D
look… down