Most of the libraries are free to people.A．YB．NC．NG

Promotions are usually used to attract low－income shoppers.A．YB．NC．NG

People are suggested climbing mountains to keep healthy.A．YB．NC．NG

To become a member of euro, the countries must meet the convergence criteria.A．YB．NC．NG

The earliest large Greek library is built by Ptolemy I.A．YB．NC．NG

Domes are the environment－friendly building.A．YB．NC．NG

The economic effect of Gulf War was of significance to later wars.A．YB．NC．NG