—The window is dirty.
—I know. It ______ for weeks.
| A．hasn’t cleaned | B．didn’t clean |
| C．wasn’t cleaned | D．hasn’t been cleaned |
You can never imagine _______difficulty we had _______the cupboard upstairs.
| A．what a; to carry | B．how; to carry |
| C．what; carrying | D．how; in carrying |
This, I think, ________the first time that we _______traveling together. Would you like to join us?
| A．has been; go | B．was; had gone |
| C．is; will go | D．would have been; would go |
All passengers________ in the accident were sent to the nearby hospital.
| A．to find injured | B．finding to injure |
| C．to be found injured | D．found injured |
---Do you know the danger caused by smoking?
---Yes, too many cigarettes can lead to_______ lung cancer.
| A．a person suffers from | B．a person to suffer from |
| C．a person being suffered from | D．a person suffering from |
She was so ______about the problem explained by her partner that she wore a ______look.
| A．confusing; confused | B．confused; confusing |
| C．confused; confused | D．confusing, confusing |