1 . “For the families of the seven, we can not bear, as you do,     1    But we feel the loss, and we are thinking about you so very much. You     2     , and they had that special grace, that special spirit that says, “Give me a challenge and     3    ”. They had     4    and discover its truths. They wished to serve, and they did. They served all of us.”（根据句意填空）