Partly _____ about his lost love, he occupied himself with office work.
| A．forgetting | B．to have forgotten | C．having forgotten | D．to forget |
The fire was finally ______ after the building had ______ for two hours.
| A．put off; caught fire | B．put away; been on fire |
| C．put out; been on fire | D．put out; caught fire |
I have offered to paint the house ______ a week’s accommodation (居住).
| A．in exchange for | B．with regard to | C．by means of | D．in place of |
_______ well prepared you are, you still need a lot of luck in mountain climbing.
| A．However | B．Whatever | C．No matter | D．Although |
We had to wait half an hour _____ we had already booked a table.
| A．since | B．although | C．until | D．before |
Tom was thinking about how to explain to the teacher why he was late for class, when a good idea ______ to him.
| A．happened | B．brought | C．occurred | D．struck |