We will have a          study later.

             A. far                     B. farther                   C. further                D. farer

They took rock samples back to Earth for _____study.

A. farther         B. step by step          C. further         D. far away

Please contact Sandy ______ 65408888 for ______ information.

    A. on, farther      B. on, further      C. in, farther        D. in, further

All he wanted was to go abroad for _______ education.

A. farther                     B. far          C. further                 D. nearer