_______ the house on fire, he dialed 119.
| A．To see | B．Seeing | C．Having seen | D．Being seen |
Sam___________ some knowledge of the computer just by watching others working on it.
| A．brought up |
| B．looked up |
| C．picked up |
| D．set up |
Armed with the information you have gathered, you can __________ preparing your business plan.
| A．set out |
| B．set about |
| C．set off |
| D．set up |
The club,__________25 years ago, is holding a party for past and present members.
| A．founded |
| B．founding |
| C．being founded |
| D．to be founded |
According to research, children whose parents __________ are more likely to have difficulty __________ their studies.
| A．split up ； concentrating on |
| B．broke into ；to focus on |
| C．gave up ；concentration on |
| D．put into ； focusing on |
As soon as the gate was opened, the people around me rushed into the supermarket and I got __________ from my mother.
| A．separated |
| B．divided |
| C．missed |
| D．lost |