合环操作必须相位相同，操作前应考虑合环点两侧的（）。

A、负荷大小；

B、电压差；

C、相角差；

D、电源大小。

— Can you tell me ______
—By doing more speaking.

A. how I will improve my English
B. which way can I choose
C. how do I deal with my English
D. what's wrong with my English