4,5,7,9,13,15,()
A.17 B.19 C.18 D.20
2,2,0,7,9,9,()A.13 B.15 C.18 D.20
4,5,7,9,13,15,______ () A.17 B.19 C.18 D.20
4,5,7,9,13,15,() A.17 B.19 C.18 D.20
4,5,7,9,13,15,()A.17B.19C.18 D.20
4,5,7,9,13,15, ()。A. 17B. 19C. 18D. 20