1: Is Bob still in Sheffield?
Yes, he is.
2: Is he still in his hotel?
No, he isn't.
3: Is miss Ellis in?
Yes, she is.
4: Is she still busy?
No, she isn't.
5:Is it nine?
Yes, it is.
6: Is Bess in time?
Yes, she is.
7: Is his test simple?
No, it isn't.
8:Is it in his file?
Yes, it is.
9: Is it time?
Yes, it is.
10: Is it on his list?
No, it isn't.
11. Is Ted fifteen?
Yes, he is.
12.Is Nelly ill?
No, she isn't.
13. Is Ben still in Leeds?
Yes, he is.
14. Is his shop still open?
Yes, it is.
15.Is it easy?
No, it isn't.
16. Is it simple?
Yes, it is.