178.
1.It is,There is, it is,it is.
2.There is,It is.
3.There is,there is.
4.There is,it is.
179.
1.There are,they are.
2.They are,there are.
3.There are,they are.
4.There are,they are.
5.They are,there are.
180.
1.When.
2.Where.
3.Why.
4.What.
5.Who.