Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.
| A．why | B．that |
| C．when | D．ours |
Many of us have a bad opinion of him, but he ____________ by his leaders.
| A．is thought highly of | B．is highly thought of |
| C．thinks highly of | D．is thinking highly of |
--Mike’s bike didn’t work yesterday, so he didn’t go there with his deskmate.
--He _________ mine. I wasn’t using it then.
| A．need have used | B．must have used | C．could have used | D．can have used |
The old professor, to_______ the important invention _______, decided not to keep it for himself, but to make it known to all over the world.
| A．whom; was belonged | B．which; belonged |
| C．whom; belonged | D．which; was belonged |
It remains ______ whether Liu Xiang will take part in the next Olympics.
| A．to see | B．to be seen | C．seeing | D．to have seen |
I don’t think the problem you referred to is worth______.
| A．thinking | B．being thought over |
| C．thinking over | D．considering of |