题干
It__________details about pricing for the 2012 London Olympics will be available．
A：isn’t until later this year that
B：is until later this year
C：is until later this year that
D：not until later this year is that
答案(点此获取答案解析）
A
Cu+Cu2+(未配平)。
气体产生；③溶液呈蓝色。