__________ environmental damage is done, it takes many years for the ecosystem(��̬ϵͳ) 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
Zheng says that the most dangerous thing about a credit card is____ a person isn't always aware of the fact____ he's spending money.
A. that; that B. what; that C. that; what D. what; which
