People have become aware ______the fact that carbon dioxide, poison to the environment, contributes_____ air pollution.
| A．of, to | B．/, to | C．of, of | D．of, for |
Train tickets are allowed to be booked online or by phone, a good way to make purchasing train tickets more________.
| A．systematic | B．effective |
| C．accessible | D．practical |
He is busy writing the article all the morning, only ________ occasionally to have a cup of coffee.
| A．breaking off | B．breaking down |
| C．breaking through | D．breaking up |
The program “Master’s Lectures” of CCTV is both interesting and instructive. No wonder it _______ a large audience.
| A．adapts to | B．appeals to |
| C．accounts for | D．allows for |
The education reform is being carried out in China. It’s certain that a completely new situation will _________ when the new examination system comes into existence.
| A．advocate | B．promote | C．arouse | D．arise |
China will ______ greater international responsibilities. This not only meets the expectations of the international community, but also serves China’s own interests.
| A．guarantee | B．sponsor |
| C．concentrate | D．undertake |