---Could I clean the bedroom for you?
---No, thanks. I _______ it myself.
| A．cleans | B．have cleaned |
| C．was cleaning | D．had cleaned |
______ he is very busy, Li Ming always helps others.
| A．Although | B．If | C．Unless | D．Since |
The visitors our factory two days ago.
| A．got | B．reached in | C．arrived | D．reached |
The story happened ________ the 19th century
| A．in | B．at | C．on | D．of |
Sign means “please don’t park your car here.”
–Where is Mr. Smith?
--He isn’t here. He ______ to England.
| A．has been | B．has gone | C．went | D．goes |