She ____ the house the whole morning but it seems to be at least an hour before she finishes it.
| A．has been cleaning | B．cleaned | C．had cleaned | D．has cleaned |
When I was little, my mother used to sit by my bed, ______ me stories till I fell asleep.
| A．having told |
| B．telling |
| C．told |
| D．to tell |
The engine just won’t start. Something seems ______ wrong with it.
| A．to go |
| B．to have gone |
| C．going |
| D．having gone |
（2013·辽宁卷)Lauro was away in Paris for over a week.When she got home,there was a pile of mails for her
| A．waited | B．to wait | C．waiting | D．was waiting |
In some languages, 100 words make up half of all words _______in daily conversations.
| A．using | B．to use | C．having used | D．used |
_______ which university to attend, the girl asked her teacher for advice.
| A．Not knowing | B．Knowing not | C．Not known | D．Known not |