. The guide showed the travelers _____ of the factory.
| A．in | B．out | C．off | D．around |
While the government says there is a(n) ________supply of houses，prices of apartments have been going up these years.
| A．parallel | B．absent | C．abundant | D．short |
Car dealers also have a tough time in bad economy. Therefore，they have to ________ their business model to overcome the difficulties.
| A．admit | B．adjust | C．replace | D．remove |
Warmblooded animals live an active life even in freezing winter，which helps them to ________ their normal body temperature.
| A．keep up | B．build up | C．bring up | D．pick up |
People have planted a great many trees in order to ________ wind and sand in the desert.
| A．hold down | B．hold up | C．hold back | D．hold out |
Traditionally, Chinese people _______ the Chinese characters Double Happiness and stick them onto walls or doors for weddings.
| A．cut out | B．cut off | C．cut up | D．cut down |