Lesson 2.
----------
* Problem 1.
1. Is this an orange ?
	Yes, it is .
2. Is that an apple ?
	No, it is not.

* Problem2. 
1. Is this an apple ?
	- Yes, it is.
2. Is that your pencil ?
	- No, it is not.
3. Is this your cap ?
	- No, it's not. It's Emi's.

* Problem3. 
1. This is a bike.
	This is not a bike. 
	This isn't a bike.
2. That is your bag. 
	That is not your bag.
	That isn't your bag.

* Problem 4.
1. This is your book.
	Is this your book? 
	Yes, it is.
	No, it is not.
2. That is Ken's bag ?
	Is that Ken's bag ?
	Yes, it is.
	No, it is not. It's Bob's.
	No, it isn't. It's Bob's.