S1. According to the passage, language reveals the speaker in the speaker in the way that___________.

A．Protecting buyers of paintings.
B．Why copies of famous paintings are made.
C．How paintings are sold in the United States.
D．Protecting artists from others’ illegal use of their work.

A．Nothing can help registration difficulties.
B．Telephone registration is not as bad as what people think.
C．Telephone registration is much easier.
D．Telephone registration may give him a lot of trouble.