问题:
The sign_____is often found in a reading-room or a library.
A.NO PHOTOS
B.KEEP QUIET
C.THIS SIDE UP
D.OPEN
The sign_____is often found in a reading-room or a library.
A.NO PHOTOS
B.KEEP QUIET
C.THIS SIDE UP
D.OPEN
A.NO PHOTOS
B.KEEP QUIET
C.THIS SIDE UP
D.OPEN
参考答案: