单项选择题

I_________ my wallet when I was shopping in the store.

A．must have dropped
B．should have dropped
C．could drop
D．ought to have dropped
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单项选择题
What can be concluded from the passage
A．Genuine writers often find their work interesting and rewarding.
B．A writer’s success depends on luck rather than on efforts.
C．Famous writers usually live in poverty and isolation.
D．The chances for writer to become successful are small
单项选择题
_______purpose did you say their team would beat ours
A．For which
B．What
C．For what
D．Which
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