He waited until it was dark ____ nobody could see him clearly.
| A．so that | B．in order to | C．although | D．however |
How much would you __________ for repairing my watch?
| A．spend | B．cost | C．charge | D．pay |
She was surprised to know that the doctor was __________ too much for the treatment he was giving her.
| A．affording | B．costing | C．offering | D．charging |
Don’t put the chair too close to the stove.Dry wood __________ fire easily,you know.
| A．lights | B．burns | C．makes | D．catches |
Good Heavens!How could you stand by and __________ such a thing to happen!
| A．promise | B．permit | C．allow | D．let |
Recently the newspapers have reported several __________ of the coal mines happening in different provinces in China and the government has taken effective measures to stop such things.
| A．accidents | B．events | C．happenings | D．incidents |