Mother told Jim to watch the milk until it boiled and then _________ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
If you __ a fire, please break the glass to sound the fire alarm.
| A．make | B．find out | C．invent | D．discover |
There used __ a bus stop in the corner.
| A．to having | B．to be | C．to being | D．to have |
Do you start now? Good ___ your trip.
| A．lack of | B．luck with | C．luck to | D．lucky to |
He paid 6,000 dollars ___ the man ___ that car.
| A．for; of | B．for; to | C．to; for | D．to; on |
As the wood us wet, it won’t ___.
| A．be caught fire | B．catch fire | C．on fire | D．put on fire |