Tom’s father had not spoken to him since his marriage, because he considered Tom ______ a mistake in marrying so young a girl.

A．had made

B．made

C．would make

D．was making

一肺气肿患者登楼、上坡时出现气短。

据六级制主观呼吸功能障碍程度评定，该患者主观呼吸功能障碍程度属于（）。

A.1级

B.2级

C.3级

D.4级

E.5级