—How do you study English so well?
—I study ________ reading English magazines.
A. at B. on C. By
I was watching TV ____ the thief came into the house.
| A．when | B．while |
| C．for | D．because |
Look! The boy is sitting ____ a tree.
| A．on | B．in | C．of | D．above |
— ____ you reading at this time yesterday? — No, I was ____ .
| A．Were; singing | B．Are; watching TV |
| C．Were; put off | D．Are; having a rest |
Mrs Green is ________ mother.
A.Jim and Kate
B.Jim’s and Kate’s
C．Jim and Kate’s
We have ________ students.
A. fourty –four
B. four – fourty
C. forty – four