11. How much does it cost for the coat?
12. How much is it for the coat?
13.What is the hight of the Big Ben Clock Tower?
14.How much does it cost for this face mask?
15.You don't need to finish work today.
16. He doesn't need to study hard.
17.You need to do homework
18.It is very interesting to go swimming in the summer.
19.Learning Einglish well is neceessary.
20.We are interested playing football very much.