All the speech acts that belong to the same category share the s

All the speech acts that belong to the same category share the same purpose, but they differ ______.
A、in their strength or force
B、in their illocutionary acts
C、in their syntactic form
D、None of the above
【正确答案】：A
【题目解析】：All the speech acts that belong to the same category share the same purpose, but they differ in their strength or force.