—My teachers often encourage me ________ more friends but I find it difficult.

—Your teachers’ idea is right. The more friends you make, ________ you will be.

A．to make; the more happy

B．to make; happier

C．making; the happier

D．to make; the happier

男性，15岁，少尿水肿5天，咳嗽气短不能平卧1天，起病前2周曾有喉痛3天，BP 170/110mmHg，端坐呼吸，两肺底有散在湿啰音，尿比重1.022，尿蛋白(+++)，红细胞30～ 90个/HP，血补体C₃降低，诊断为

A．慢性肾炎急性发作

B．急性肾炎并左心功能不全

C．高血压病并左心功能不全

D．急进性肾炎并左心功能不全