1、空格里填is,即为 There is some milk in the fridge.冰箱里有些牛奶.这是there be句型,意思是“有、存在” .milk是不可数名词,故用单数there is.如果是复数如鸡蛋eggs则为：there are some eggs in the fridge.
2、动词在现在时态+ing,如,我正在看书i'm reading now.
动词作名词时+ing,如,走路去学校真的很累.Going to school by foot is really tiring.这里的go+ing就是动名词.