He ran as fast as he could _____ to catch the bus.
| A．hope | B．to hope | C．hoping | D．hoped |
Father insisted Tom _____ all his homework before he went to bed.
| A．finishing | B．to finish |
| C．finish | D．finished |
I met this guy _____ some other occasions but he did not seem to recognize me.
| A．for | B．on |
| C．at | D．in |
I don’t like the lecture yesterday. Most of what the speaker said was _____ the subject.
| A．on | B．off |
| C．of | D．around |
The demand for _____ skilled workers is still increasing.
| A．high | B．higher |
| C．highly | D．more highly |
My new neighbor is a _____ person; he never speaks to anyone and nobody knows where he is from and what he is doing.
| A．curious | B．anxious |
| C．mysterious | D．glorious |