To check a paper for unity， ask yourself these questions（）.

A.Is there enough specific evidence？

B.Are all the materials on target in support of the opening point？

C.Is there specific evidence to support the opening point？

D.Is there a clear opening statement of the point of the paper？

正确答案：Are all the materials on target in support of the opening point？Is there a clear opening statement of the point of the paper？