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單項選擇題

Many companies spend a lot of money and time（）their trademarks.

A. to register
B. registering
C. register

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單項選擇題

You are planning to export this product to Europe,（）

A. don't you
B. aren't you
C. are you

單項選擇題

A:I can show you around, if you like.
B:（）

A. Let's go.
B. Sure. Thank you.
C. I can't wait.

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