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單項選擇題

By（）computation, the seller estimated that the profit will be 5 %.

A.coarse
B.crude
E.rough
D.rude

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單項選擇題

He is not（）to understand the market situation.

A.so quick
B.quick enough
C.enough quick
D.as quick as

單項選擇題

By law，a buyer should have（）opportunity to change his mind.

A.accurate
B.urgent
C.excessive
D.adequate