---Hurry, John!
---Oh, damn! Both my legs are nearly to give out. I ____for hours.
| A．had walked | B．walked | C．have been walking | D．am walking |
With the land of the city becoming rare, more and more high-rise buildings are under construction around the Jingmen City ___________ space.
| A．in search of | B．on behalf of |
| C．for lack of | D．in charge of |
Beijing's first unmanned subway trains, which can run ______ without the control of any drivers, are expected to be put into operation next year.
| A．regularly | B．deliberately |
| C．automatically | D．desperately |
As an experienced teacher, your teaching methods have to be _________enough to meet the demands of different students.
| A．controversial | B．flexible |
| C．stubborn | D．conventional |
Hubei province has also been stricken by the heavy fog and haze, which ________ be worse and worse and will be a threat to human’s health.
| A．tends to | B．attends to |
| C．subscribes to | D．applies to |
When you state your plan to improve the service of the hotel at the meeting, remember not to_____ any important details.
| A．bring out | B．let out |
| C．squeeze out | D．leave out |