--What did he say in_______ of his stupid behavior?
--He admitted having made a serious mistake.
| A．explanation | B．favor | C．case | D．fear |
__________ 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 |