We should keep in mind that the introduction should contain ()to() percent of the whole speech.
A.5,10
B.10,15
C.15,20
D.20,25
正确答案:B
We should keep in mind that the introduction should contain ()to() percent of the whole speech.
A.5,10
B.10,15
C.15,20
D.20,25
正确答案:B