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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1.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

2.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.