—Who has made a mess in my room?
—Who else it but your naughty son?
| A．could do | B．could have done | C．did | D．has done |
He tried to invite some famous pop stars to sing in the concert ______, but failed.
| A．with free | B．for freely | C．with freedom | D．for free |
_____ we have finished the course, we shall start doing more revision work.
| A．For | B．Ever since | C．Now that | D．By now |
I don’t like the way ________ Mr. Wang treats his children.
| A．/ | B．in that | C．of which | D．which |
I meant to help him . ______， he didn’t accept my offer.
| A．But | B．As a result | C．Therefore | D．However |
Several months later, he found his deskmate very difficult _______.
| A．to get along with | B．getting along with |
| C．to get along | D．to be gotten along with |