2. Feathers fall to the ground slowly ______ stones fall much faster.

A. but              B. while                  C. although         D. Yet

Feathers fall to the ground slowly,________ stones fall much faster.

A.but                           B.however                    C.while                        D.yet

Feathers fall to the ground slowly ______ stones fall much faster.

A. but 　　　　 B. while 　　　　　 C. although 　 D. yet