25. Thirty years ago this month，China's leaders launched an economic revolution.___________the door to free market reforms and foreign trade．
| A．to open | B．opened | C．opening | D．having opened |
I can't tell you____ way to the Wilson's because we don't have _____Wilson here in the village.
| A．a; / | B．the; a | C．a; the | D．the; / |
Some so-called climate travelers ________ in one place for a few months and then move on to some other places as the weather changes.
| A．have stayed | B．are staying |
| C．stay | D．stayed |
The game was so exciting to play that the boy kept his eyes and attention ________ on it, ruining both a lot.
| A．fixing | B．fixed | C．to fix | D．fix |
The sides of the Iran nuclear negotiation reached a key point, the result of ________ would have a great influence on the world peace.
| A．that | B．which | C．whom | D．them |
The astronauts have to lie ________ the floor of the spaceship to fight against the great pressure during the flight.
| A．in | B．beyond | C．against | D．at |