题目内容
The Flowbee ________ over twenty-five years ago.
[ ]
|
A ．invented |
B ．was invented |
C ．is invented |
答案：B
练习册系列答案
相关题目
题目内容
The Flowbee ________ over twenty-five years ago.
[ ]
|
A ．invented |
B ．was invented |
C ．is invented |