单项选择题

You don't have to install this radio in your new car. It's an ______ extr

A． excessiveB. optionalC. additionalD. arbitrary
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单项选择题
______ his sister, Jack is quiet and does not easily make friends with others.
A．Dislike
B．Unlike
C．Alike
D．Liking
单项选择题
We shall send you commercial invoice, bills of lading and insurance certificates so that you can ______the goods on a D P basis.
A．consume
B．complain
C．concern
D．claim
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