The price of the housing is rising rapidly and nowadays lots of money _______ on houses. [ ]

A. is spent

B. has spent

C. is cost

D. is paid

患者男性，53岁，半年来于剧烈活动时或饱餐后发作心前区疼痛，并向左肩、左臂放射，持续数分钟可自行缓解，1周发作频繁且有夜间睡眠中发作，2小时来晚饭后疼痛剧烈不能缓解，向胸部及后背部放射，伴憋闷，大汗。

首选的治疗方法是

A．硝酸甘油静点

B．吗啡皮下注射

C．吸氧

D．肝素静脉点滴

E．溶栓治疗