从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
6. __________Friday before Easter is the day that Christians celebrate. That was _______day when Christ died.
A. the; \ B. the; the C. \ ; the D. a; a
7. AIDS is said _________ the biggest health challenge to both men and women in that area over the past few years.
A. that it is B. to be C. that it has been D. to have been
8. Galieo Galilei was ______ curious that he invented both a microscope and a telescope in order to be able to ________ a closer look at things great and small．
A．so；take B．so；give C．such；take D．such；give
