第1题:
4,6,5,7,7,9,11,13,19,21,( )
A. 27,29
B. 32,33
C. 35,37
D.41,43
第2题:
4,6,5,7,7,9,11,13,19,21,( ),( )
A.27,29
B.32,33
C.35,37
D.41,43