In which of the following places can you
问题:
In which of the following places can you often see this sign?
[ ]
A. In a park.
B. In a school.
C. In a science museum.
D. In a street.
In which of the following places can you often see this sign?
[ ]
A. In a park.
B. In a school.
C. In a science museum.
D. In a street.