Loulan, once a small, wealthy commercial city, is believed by many people___________over gradually by sandstorms from AD 200 to AD 500.
| A．covered | B．was covered | C．to be covered | D．to have been covered |
We have been prepared to do it takes to save her life.
| A．no matter what | B．however | C．whatever | D．whoever |
There is no point arguing about what _____ the accident. The point is what to do with the victims of it.
| A．led to | B．caused to | C．accounted to | D．resulted from |
I regret _____ you that my sister regretted _____ you her date. You are not the kind of person she wants.
A. telling; making C. to tell; to make C. telling; to make D. to tell; making
Operation rooms should be kept free ______ bacteria of any kind.
| A．with | B．for | C．from | D．to |
I would rather you _______me the truth; then what has happened would not have happened.
| A．to tell | B．tell | C．told | D．had told |