---Pleas your room because it’s dirty.
----OK, I will.
| A．tidying | B．tidy up | C． untidy | D．clear off |
Mr. Lee has worked in a bookshop _______ he left college in 2007.
| A．until | B．while |
| C．since | D．from |
Mike was ill yesterday, _______ he didn’t go to school.
| A．if | B．but | C．so | D．or |
September is the ____ month of a year.
| A．nine | B．ninth |
| C．nineth | D．ninety |
The little girl was very happy ______ her new friend gave her a beautiful present.
| A．but | B．because |
| C．so | D．although |
It will be hard for us to get up in the morning if we _______ to bed too late.
| A．went | B．go |
| C．will go | D．have gone |