★ KS3-ENLA-UKL-0169正面
An infix
提示English only does it for fun: 'fan-flipping-tastic'.
为什么English barely has them, so they are easy to miss. In a puzzle, if two related words share a beginning and an ending but differ in the middle, the difference is probably an inserted piece, not a change to the root.
下次复习日期相同——「太简单」会让之后的间隔拉得更快
★ KS3-ENLA-UKL-0169背面