She often helps her father the house on Sunday.
| A．cleans | B．cleaning | C．clean | D．to cleaning |
The teachers ________ on the blackboard with chalk in the future.
| A．isn't writing | B．didn't write | C．don't write | D．won't write |
- ________ book is this?
-- It's Mary's.
| A．Whose | B．Where | C．How old | D．How many |
There ________ some tomatoes and milk in the box, but now there aren't any.
| A．is | B．were | C．was | D．have |
Our school is ________ a park and a big library.
| A．between | B．Next | C．across | D．in |
Is this ________ bike? No. ________ is over there.
| A．your; my | B．you; I | C．your; mine | D．yours; mine |