I was not __________ her presence till she spoke to me.
| A．aware | B．aware about |
| C．aware of | D．aware to |
It was in the small house _____was built with stones by his father ____he spent his childhood.
| A．which; that | B．that; where | C．which; which | D．that; which |
__________ 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 |