-2,-5,8,9,-14,-13,20,17,-26,(),……
A. -21
B.21
C. -29
D.29
A.49
B.51
C.43
D.53
2,2,8,-1,-2,5,1,1,2,-1,1,( )
A.-2
B.-1
C.1
D.2
A.8
B.9
C.13
D.16
A.8448
B.8450
C.8452
D.8454