--- Do you have any idea what Paul does all day?
--- As I know, he spends at least as much time playing as he ．
| A．writes |
| B．does writing |
| C．is writing |
| D．does write |
Sorry, I'm late. I________have turned off the alarm clock and gone back to sleep again.
| A．should |
| B．might |
| C．can |
| D．will |
I posted a book to her three weeks ago. She________have received it.
| A．must |
| B．should |
| C．might |
| D．could |
She________have been to your house. She doesn't know your address.
| A．mustn't |
| B．shouldn't |
| C．might not |
| D．can't |
—I'm sorry, Mrs Smith. I've broken your glasses.
—It doesn't matter, Marks, but you________careful.
| A．must be |
| B．should be |
| C．must have been |
| D．should have been |
I can't find the recorder in the room. It________by somebody.
| A．may have been taken away |
| B．may leave |
| C．may take away |
| D．must have taken away |