电力公司+太阳能panel太阳能板发电，多于自己的用电量返钱，少于自己的用电量补钱
选 电力公司怎么计费的和 电力公司在什么时候计费(原文是说 at the end of year)
Multiple Choice (Multiple) #8
Listen to the recording and answer the question by selecting all the correct responses. You will need to select more than one response.
