Remember that everyone can do something to make a ____ (different) to our nature.
在尼泊尔地震中，某人因伤失明，经检查发现其形成视觉的神经中枢受损，该中枢在（ ）
While I was away from my home last year, I always________ my family.
下列词语中，字形和划线字的读音全都正确的一组是（ ）
