★ GCSE-ENLA-GRA-0001正面
necessary
提示One collar and two sleeves: count the c and the s.
为什么'Necessary' has one c and a double s. Picturing a shirt (one collar, two sleeves) fixes the pattern; the same pattern holds in 'necessarily' and 'unnecessary'.
★ GCSE-ENLA-GRA-0001背面