问题

The number of tickets _____ willbe determined by the size of the stadium.
A:haveexperienced
B:parents possibly don’t control teens in using the electric devices
C:there is no need for parents to make use of the electric devices
D:available
B:parents possibly don’t control teens in using the electric devices
C:there is no need for parents to make use of the electric devices
D:available
正确答案是: