一When shall we start the restoration of the historic buildings?
一Not until our plan________ by the committee．
| A．will be approved | B．approves |
| C．is to approve | D．has been approved |
__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.
| A．Even if | B．If only | C．While | D．Once |
I like this jacket better than that one, but it costs almost three times______.
| A．as much | B．as many | C．so much | D．so many |
Only when I left my parents for Italy __________how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
I felt so bad all day yesterday that I decided this morning I couldn’t face ________ day like that.
| A．other | B．another | C．the other | D．others |
Years ago we didn’t know this, but recent science _______ that people who don’t sleep well soon get ill.
| A．showed | B．has shown | C．will show | D．is showing |