fix: extra input for opening statement was not suitable for prompt (#143)

api/core/completion.py

 And answer according to the language of the user's question.
 """
                 if pre_prompt:
-                    human_inputs.update(inputs)
+                    extra_inputs = {k: inputs[k] for k in
+                                    OutLinePromptTemplate.from_template(template=pre_prompt).input_variables
+                                    if k in inputs}
+                    if extra_inputs:
+                        human_inputs.update(extra_inputs)
                     human_message_instruction += pre_prompt + "\n"
 
                 human_message_prompt = human_message_instruction + "Q:{query}\nA:"
             else:
                 if pre_prompt:
-                    human_inputs.update(inputs)
+                    extra_inputs = {k: inputs[k] for k in
+                                    OutLinePromptTemplate.from_template(template=pre_prompt).input_variables
+                                    if k in inputs}
+                    if extra_inputs:
+                        human_inputs.update(extra_inputs)
                     human_message_prompt = pre_prompt + "\n" + human_message_prompt
 
             # construct main prompt