Complete the following sentences with the most suitable prepositions.In some sentences,alternative answers are possible.
1.Where are you leaving_______?
2.Where does this road lead_____?
3.What does this material consist ____?
4.What on earth are you here ______?
5.What did you make the hole______?
6.Where are our guests coming______?
7.How much does the bill come__________?
8.What age did he finish secondary school_____?