At last, we found ourselves at the foot of a hill with trees providing shade and ________ down to eat our picnic lunch.
| A．sitting | B．having sat |
| C．to sit | D．sat |
Why haven't you finished your homework yet? You ___________ to have finished it by last Sunday.
| A．are supposed | B．were supposed |
| C．are supposing | D．were supposing |
Could you give me a hand __________from the car, please?
| A．to carry the shopping | B．for carrying the shopping |
| C．and carrying the shopping | D．carrying the shopping |
--I'm told that John had another car accident this morning.
--I believe not. He ________so careless.
| A．shouldn't have been | B．wouldn't have been |
| C．couldn't have been | D．mustn't have been |
The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
| A．to be invented | B．having been invented |
| C．invented | D．to have been invented |
--I didn't know this was a one-way street, officer.
------_________
| A．That's all right. | B．I don't believe you. |
| C．How dare you say that? | D．Sorry, but that's no excuse. |