As we all know, _______ mankind has realized the walk in ______ space.
| A．the; the | B．/; the | C．/; / | D．the; / |
By the end of Last year, we _____ more than 1,100,000 cars.
| A．were producing | B．produced |
| C．had produced | D．would produce |
Now their talks have reached a key stage________one side must give in to the other.
| A．which | B．that | C．where | D．how |
There is a big garden in the residential buildings，________actually has become a good place for people to meet and communicate.
| A．where | B．in which | C．that | D．which |
She was so________that she wouldn’t give in until she received a full apology.
| A．simple | B．lucky |
| C．stubborn | D．proper |
________life in a new country can be difficult, it can broaden a person’s view of the world.
| A．If | B．Although | C．Because | D．While |