---What’s this in English?
---________ a coat.
A. This is B. That is C It is
Don’t swim here, or you may be ____ .
| A．in danger | B．danger |
| C．safe | D．well |
— What will the weather be like tomorrow? — It might be ____ .
| A．rain | B．sun | C．sunny | D．wind |
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 |