—I like your new leather boots!
—Thanks．I had to try on almost a dozen pairs ______ I decided to get them．
| A．as | B．when | C．after | D．before |
Paper making began in China and from there it _____ to North Africa and Europe.
| A．took | B．spilled | C．carried | D．spread |
When the entire class worked together they finished the project _____.
| A．in no way | B．in no time | C．on no account | D．in no case |
Having checked the doors were closed, and _____all the lights were off, the boy opened the door to his bedroom.
| A．why | B．that | C．when | D．where |
To save class time, our teacher has ______students do half of the exercises in class and complete the other half for homework.
| A．us | B．we | C．our | D．ours |
The _____ of his clothes indicated too clearly that he had been playing football.
| A．state | B．condition | C．occasion | D．situation |