定语从句1the company and the effect----brought about did great g

1. 选C,这句话就相当于"The company and the effect that the company brought about...",这里it代替the company;brought about前面明显缺少一个主语,而这里也只有it可以作为修饰the effect的定语从句的主语;
2. 这一句有点问题,不是很明白它想表达什么意思...中间那句"whom I was at school和前面的句子明显断开来了",所以我能确定的只是如果不看着一部分,那么这一题应当选A,即"I have kept up a friendship with a girl since twenty years ago",表示从20年前开始,我就一直和一个女孩儿保持着友谊,这样比较make sense