1,2,2,3,4,()
A.4
B.5
C.6
D.7
:1,2,2,3,4,()。A.4 B.5 C.6 D.7
:1,4,3,5,2,6,4,7,()。A.1 B.2 C.3 D.4
1,2,2,3,4,() A.4 B.5 C.6 D.7
1,2,2,3,4,()A.4 B.5 C.6 D.7
1,4,3,5,2,6,4,7,() A.1 B.2 C.3 D.4
1,4,3,5,2,6,4,7,()。A.1 B.2 C.3 D.4