单项选择题
Where is the two panda’s original home（）
A．Some mountains in Siehuan Province. B．A certain base in the city of Chengdu. C．The Atlantic Zoo in the United States. D．A separate room inside the panda hous
单项选择题 21（）
单项选择题 From the story at the beginning of the passage we know it is dangerous for a driver（）
单项选择题 （）different opinions as where the word "Okay" came from are mentioned in the text.
