单项选择题

--Why does Sara know so much about Angkor Wat--She ______ have been there, or because of some other reasons.

A．must
B．oughtn't to
C．may
D．can't
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单项选择题
--What do you do to ______ your living--My job is ______ the tables and I also do some other things 'in the restaurant.
A．earn; laying
B．make; lying
C．earn; to lie
D．make; laid
单项选择题
--I promise that his daughter ______ get a nice present on her birthday.--Will it be a big surprise Io her
A．should
B．must
C．would
D．shall
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