单项选择题
A.contribute B.attribute C.subtract D.contract
You didn't have to write the essay if you didn't want t...
单项选择题You didn't have to write the essay if you didn't want to. It was（）
A.compulsory B.suitable C.alternative D.optional
Income tax rates are（）to one's annual income.A.relatedB...
单项选择题Income tax rates are（）to one's annual income.
A.related B.dependent C.based D.associated
The speaker talked about sports in general and about fo...
单项选择题The speaker talked about sports in general and about football（）
A.in brief B.in sequence C.in short D.in particular
