As a green hand, he doesn’t know it takes to start a business here.
| A．what | B．how | C．when | D．which |
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 |
．People like taking photos because photos are the _______ of youth and history and can remind us of many happy scenes.
| A．witness | B．guidance | C．evidence | D．approval |