Question

2. When we got to the theater, the play _____ for five minutes.怎么做?

Answer 1

答案是：had been on。
注意：只要英语里有for+一段时间，就说明前面的动词肯定是持续性动词，那么就不能是begin, start之类的了！所以要选一个持续性动词。那么on即为持续性的，表示开演多长时间。

Answer 2

had been on

Answer 3

had begun

Answer 4

had been performed