The company has changed some of its working practices _____ complaints and criticism from the customers.
| A．in respect to | B．in return for | C．in exchange for | D．in response to |
As the train ran faster and faster，the lights of the city were soon ________.
| A．left off | B．left alone |
| C．left behind | D．left out |
At the edge of the grass，there's a sign saying“________ the grass”．
| A．Keep up | B．Keep away |
| C．Keep off | D．Keep back |
Suddenly I realized that I had stayed here long and ________ to say goodbye to the host.
| A．raised | B．rose | C．lifted | D．stood |
How can Margot ________ from her illness in this room when it is so dirty and dusty？It will only make her worse.
| A．suffer | B．recover | C．discover | D．return |
His injuries are extremely serious，but he's expected to ________.
| A．pull in | B．pull through |
| C．pull up | D．pull over |