when( ) is still unknown to us all A、starting B、start C、going to _英语解答

when( ) is still unknown to us all A、starting B、start C、going to start D、to start选什么呀

人气：236 ℃　时间：2019-11-05 03:35:43

解答

选D,表示什么时候开始还是未知的
It is still unknown to us all when to start.
放到后面就好理解了.