Einstein’s Theory of Relativity is so ________that most of us can not understand it.
| A．controversial | B．abstract |
| C．appropriate | D．universal |
Most of the people __________ to the party were famous scientists.
| A．invited |
| B．to invite |
| C．being invited |
| D．inviting |
The murderer was brought in, with his hands __________ behind him.
| A．being tied |
| B．having tied |
| C．to be tied |
| D．tied |
There was a terrible noise __________ the sudden burst of light.
| A．followed |
| B．following |
| C．to be followed |
| D．being followed |
—On my part, we'd better invite some of our school friends from other grades to our party.
| A．Oh, never mind. |
| B．Sure, no problem. |
| C．Yes. Why not? |
| D．Well, go ahead. |
—Do you mind if I use your dictionary?
—__________.
| A．Sure, go ahead |
| B．Yes, please |
| C．No, you shouldn't |
| D．No, go ahead |