单项选择题

______ the surface of metal, but also weakens it.

A．Not only does rust corrode
B．Not only rust corrodes
C．Rust not only corrodes
D．Rust, which not only corrodes
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单项选择题
Let's ______ when the ship will arrive.
A．find out
B．discover
C．find
D．invent
单项选择题
She's such an irritating woman, and I don't know how you can ______ her.
A．put up
B．put up with
C．stand up with
D．stand with
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