一、“What's this/that?”的用法
() 1. — that?
— a pencil case.
A. What's; It's
B. What; It's
C. What's; This is
() 2. 你想知道近处的物品是什么，可以问：
A. What's that?
B. What's this?
C. It's a book.
3. What's this?(根据图片提示回答问题)

1. A 2. B 3. It's a pencil.

二、确认某物是否是某种物品的句型
“Is it...?”意为“它是……吗?”，用于确认某物是否是某种物品。其肯定回答为：“Yes，it is.”，其否定回答为：“No，it isn't.”或“No，it's a/an...”。
() 1. — Is it a ? — No，it is a fox.
A. cat
B. fox
C. rulers
() 2. 你想知道课桌上的是不是书包，可以问：
A. What's this on the desk?
B. Is it a schoolbag?
C. No，it isn't a schoolbag.
3. 根据图片提示回答问题。
① Is it a ruler?

② Look! Is that a pencil case?

1. A 2. B 3. ① Yes, it is. ② No, it isn't. / No, it's a schoolbag.