Maintaining (维持) peace and stability of the South China Sea and the East China Sea will certainly ____ a more prosperous Asian-Pacific area.
| A．contribute to | B．respond to | C．belong to | D．appeal to |
You have to believe in yourself. Self-confidence is _____ to success.
| A．essential | B．combined | C．similar | D．compared |
His spare time is made full use_______ law.
| A．to study | B．study | C．of studying | D．of to study |
Mark needs to learn Chinese _______ his company is opening a branch in Beijing.
| A．unless | B．until | C．although | D．since |
sales of cars up by 30% last year, the traffic in Beijing has become increasingly terrible.
| A．With | B．Since | C．For | D．As |
It is recognized that the part ___ the UN plays in international relations is important.
| A．in which | B．where | C．that | D．of which |