Did you know ?
A.What is she doing
B.What she is doing
C.What she was doing
--- Your classroom is very clean.
--- Sure. It ________ after school every day.
| A．is cleaned | B．cleans | C．cleaned | D．is cleaning |
They _______ here for more than ten years.
| A．live | B．lives | C．are living | D．have lived |
---Oh, your computer is so nice. ____ did you buy it?
---Thanks. I bought it in Wangfujing Dajie.
| A．When | B．Where | C．Which | D．Whose |
John had to start work at an early age, ____ his family was very poor.
| A．or | B．so | C．but | D．because |
When I got to Linda’s home yesterday, she _______ her mother with the housework.
| A．help | B．helps | C．was helping | D．is helping |