Across North China in the world, namely the Great Wall.
| A．the longest wall runs | B．runs the longest wall |
| C．does run the longest | D．does the longest wall run |
It is difficult for you to ______ what will happen in space without gravity.
| A．depend on | B．have some idea of | C．keep from | D．equip with |
The ______ in the mountain village struck most of the visitors.
| A．scenes | B．space | C．absence | D．flight |
Since we have met again after all these years, let's ________ each other from now on.
| A．keep up with | B．keep out of | C．keep in touch with | D．keep touching |
Have you found his name ______ in the papers?
| A．signing | B．signed | C．to sign | D．sign |
The schoolboy regretted _______ after he didn't pass his exam.
| A．the time on TV | B．to spend so much time on TV |
| C．taking most of his time on TV | D．spending so much time on TV |