单项选择题

A．on
B．at
C．in
D．out
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单项选择题
What did the woman buy at last
A． Insect guards.
B． Some insect nets.
C． A can of insect spray.
单项选择题
What does Jenny offer to do for Don
A． Teach him how to write a poem.
B． Help him with his math.
C． Walk with him to the library.
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