Trains with the first letter D or Z can run __________ a speed of more than 200 kilometers an hour when it travels __________ the desert.
| A．with; cross | B．in; through | C．at; across | D．for; in |
You cannot accept an opinion________to you unless it is based on facts.
| A．offering | B．to offer |
| C．having offered | D．offered |
Laura was away in Paris for over a week.When she got home，there was a pile of mail ________for her.
| A．waited | B．to wait |
| C．waiting | D．was waiting |
The room is empty except for a bookshelf ________ in one corner.
| A．standing | B．to stand |
| C．stands | D．stood |
In some languages,100 words make up half of all words ________ in daily conversations.
| A．using | B．to use |
| C．having used | D．used |
Volunteering gives you a chance________lives，including your own.
| A．change | B．changing |
| C．changed | D．to change |