How is it going_____her?填什么

It is not dark yet.But the sun is going_____.A.down B.up C.there How much is it? How is it going? How is it going? how is it How is it going? How long is it? how is big it How much is it. how is it going how much is it? How much is it? how is it doing how is it going? How is it ( ) .Great How is it possible how it is还是what it is 是How beautiful it is!还是How beautiful is it!