you have new teachers? [ ]
A. Are
B. Do
C. Is
答案：B
按要求改写下列各句，每空一词。
1. That bag is black. ( 改为同义句)
That _____ a _____ bag.
2. This is a T-shirt. (改为复数句子)
_____ are _____.
3. I like Chinese. (改为否定句)
I _____ _____Chinese.
4. The boy under the tree is Li Lei. (对划线部分提问)
_____ _____ is Li Lei?
5. What's the price of the dictionary? (改为同义句)
_____ _____ is the dictionary?
通信工程宜用天然（）砂，砂的容量要松散状态下为1300～1500kg/m3，在密实状态下为1600～1700kg/m3。
A、细
B、粗
C、中
