单项选择题

Tony ______ yesterday if he were really serious about his work.

A．ought to come
B．should come
C．must have come
D．should have come
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单项选择题
All too ______ it was time go back to work after the Spring Festival.
A．often
B．quick
C．soon
D．fast
单项选择题
They used to go shopping in the supermarket run by a foreigner, ______.
A．Mary’s mother used to
B．so used Mary’s mother
C．so did Mary’s mother
D．also Mary’s mother
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