With so much noise of the traffic, I couldn`t __________and do my research work.

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

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

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

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