单项选择题

I’m trying to be more（）when I go shopping, and only buying what I really need.

A．economy
B．economic
C．economical
D．economics

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单项选择题
He was（）enough to see that Jake was the best candidate for the job.

A．sensible
B．sensitive
C．sensational
D．sensual
单项选择题
I wanted to pay for the coffee, but I found that all Ihad was a couple of（） coins.

A．worthless
B．priceless
C．invaluable
D．inexpensive
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