高中英语语法填空
语法填空题:Iwroteanotetellingherthatthestudentsappreciatedeverythingshedidand___hercontributiontoourschoolmadeadifferenceinallofourlives.为什么用all不行呢?一定要用that吗?原因何在?and后怎么可以用that的呢?希望得到详细一点的解释.谢谢热心网友!