—What does the sign on the bottle mean?

—It means “         ”.

              A. This Side Up                          B. Dangerous                     C. Recyclable  

The sign_____is often found in a reading-room or a library.

— What does the sign  on the bottle mean?

                — It means “     ”.

                A. This side up             B. Dangerous              C. Recyclable                   D. No Parking

— What does the sign  on the bottle mean?

                — It means “     ”.

                A. This side up             B. Dangerous              C. Recyclable                   D. No Parking

—What sign is often found in the library?

—_______ .

A．NO PHOTOS       B．THIS SIDE UP       C．KEEP QUIET        D．NOT AT ALL