题干
— will the 6th Chinese Film Festival in France last?
—From May 24th to July 19th.
A：How often
B：How soon
C：How long
D：How many
答案(点此获取答案解析）
C
— will the 6th Chinese Film Festival in France last?
—From May 24th to July 19th.
A：How often
B：How soon
C：How long
D：How many
代表氢原子 
代表碳原子）（ ）