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單項選擇題

From this amount you need to（）something to cover utility bills.

A.contribute
B.attribute
C.subtract
D.contract

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單項選擇題

You didn't have to write the essay if you didn't want to. It was（）

A.compulsory
B.suitable
C.alternative
D.optional

單項選擇題

Income tax rates are（）to one's annual income.

A.related
B.dependent
C.based
D.associated