---Will you tell us what you saw in the room?
---Sure. _______ inside were lots of strange creatures with white skin and large black eyes.
| A．Having stood | B．To stand |
| C．Being standing | D．Standing |
----- Has Mary finished writing her article ?
----- No, and it _____ before class was over.
| A．should be finished | B．should finish |
| C．should have finished | D．ought to have been finished |
I really _____ thank you enough. It’s been an amazing day.
| A．needn’t | B．should | C．must | D．cannot |
16. The computer program is a puzzle to me. The more I think of it, the more questions I think of _____.
| A．ask | B．asked | C．being asked | D．to ask |
Realizing I would be late , I quickly dressed my son and _____ my bag, went to work.
| A．carried | B．carrying | C．to carry | D．having carried |
Hard work and lack of sleep has _____ her beauty and youth in recent years.
| A．worn out | B．tried out | C．made out | D．sent out |