— The light in his room is still on. Do you know _________?
— To prepare for the coming exam, I think.
| A．if he works hard | B．why he stays up so late |
| C．why is he so busy | D．when he will stop working |
There is someone at home because the lights are ________.
A.out B.on C.not
Mary,please show ________ your picture.
| A．my | B．mine | C．I | D．me |
I will take a photo ________ the house.
A.of B.in C.for
If the camera ________ start，press the “camera” key.
A.isn’t B.doesn’t C.don’t
This was how my first _______ job in radio began.
| A．correct | B．right | C．really | D．real |