单项选择题

Cats ______ afraid of dogs, but my Kitty always chases my neighbor's dog.

A．supposed to
B．are supposed to be
C．be supposed to
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Everything can't live ______ the sun.
A．with
B．without
C．of
单项选择题
Jeff here five minutes ago.
A．should arrive at
B．was supposed to be
C．should comes
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