女，25岁，心悸、水肿4年。望诊心尖搏动左移，触及心尖区舒张期猫喘。对该患者心脏听诊时，可听到的最重要的杂音是

A．心尖区舒张期杂音

B．心尖区第一音亢进

C．肺动脉第二音亢进

D．肺动脉瓣区舒张期杂音

E．主动脉瓣区舒张期杂音

Only by studying hard ________ improve her English soon.

A．she can

B．she did

C．can she

D．did she