速读课文，完成下列任务
Ⅰ.阅读判断
判断以下句子提供的信息是正确，还是错误，还是没有提及：
1．It is possible to preserve everything from our past.
A．Right. B．Wrong.
C．Not mentioned.
2．Keeping the right balance between progress and the protection of cultural sites is hard.
A．Right. B．Wrong.
C．Not mentioned.
3．The experts investigated the issue and signed a document.
A．Right. B．Wrong.
C．Not mentioned.
4．The experts began to save the buildings in 1960.
A．Right. B．Wrong.
C．Not mentioned.
