.The Forbidden City is an area ＿＿ once only the emperor, his family and officials were allowed

Is this ______ art room—–Yes, it is.

Can you explain ____ most deserts are located near the west coast of the continents?

Standing on top of the mountain, the travelers ______ their eyes on the breath-taking scenery below. [ ]

下列各句中，没有语病的一句是 (　　)