单项选择题

It's nearly seven o'clock. Jack () be here at any moment.

A．must
B．need
C．should
D．can

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单项选择题

Tom is()than Jim, both of them are very poor.

A．no rich
B．no richer
C．not richer
D．not rich

单项选择题

The number of people invited () fifty, but a number of them () absent for different reasons.

A．were; was
B．was; was
C．was; were
D．were; were

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