单项选择题

His parents ______ been to America.

A．both have
B．all have
C．have both
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单项选择题
The woman's name is Mary Joan Shute. You may call her ______.
A．Miss Joan
B．Miss Shute
C．Miss Mary
单项选择题
It's very kind ______ you ______ me.
A．for... to help
B．of... helping
C．of... to help
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