The cause of issuing travel alerts in Europe wasA．bad weather.B．political factors.C．risks

Travelers now believe that the root cause for failures of British railway is[A] its st

When permits for the discharge of chemicals into a waterway are issued, they are issued in

Another big issue ______ the new republic is the problem of the education of its citizens.

All of the following are examples of issues that the organization described in the last pa

According to Nigel, most problems of air travel are caused by ______.A．unfavorable weather

The cause of the anti-government protest in Greece wasA．staff reduction plan issued by gov