At school, some students are active, ______ some are shy, yet they can be good friends with one another.
| A．while | B．although | C．since | D．thus |
Mum，you really need to have a rest！You ________in the kitchen ever since you came back home three hours ago.
| A．had worked | B．were working |
| C．have been working | D．worked |
I have called the station and they told me the next train for Dalian ________at 3∶10.
| A．will leave | B．left |
| C．has left | D．leaves |
Who do you think ________ for the accident?
| A．to blame | B．to be blamed |
| C．is to be blamed | D．is to blame |
—When did you move to Qionghai?
—In 2009.But I ________in Haikou for many years.
| A．have worked | B．would work |
| C．have been working | D．worked |
We ________for cheap houses but haven’t found ________we like yet.
| A．are looking；one | B．have looked；it |
| C．have been looking；one | D．looked；them |