Fill in the Blank (148)

Other names: Fill in the Blanks, What's next?

Instruction:

Determine what should replace the "?" symbol to make the most sensible pattern.

Reference: WPF (1)

Notes:

Variants:
- Fill in the Blanks: Determine what should replace the "?" symbols to make the most sensible pattern.

Examples:

WPF Puzzle GP 2014 - Round 3 (89)