5,17,21,25,( )
A.34;B.32;C.31;D.30
1,3,5,11,21,()A.25 B.32 C.43 D.46
1,3,5,11,21,() A.25 B.32 C.43 D.46
5, 17, 21, 35, ()。A.34 B.32 C.31 D.3
13, 17, 21, 25, (), 33。A.27 B.29 C.31 D.32
5,17,21, 35, ()。A.34 B.32C.31 D.30
13,17,21, 25,(),33。A.27 B.29 C.31 D.32