妇科病人常见的症状有（）

A.外阴瘙痒

B. * * 出血

C.白带异常

D.下腹痛

E.以上均正确

With so much noise of the traffic,  I couldn't________and do my research work.[ ]

A. put down  

B. settle down

C. break down  

D. take down