The teacher was just_when the bell rang.A、going speak B、going to speakC、speakD、going speaking

选B如果是过去进行时,不应该是going speaking,应该是speaking.答案中没有,只能是过去将来时.The teacher was just going to speak when the bell rang.铃都响了,可是老师还打算继续讲下去.be going to do sth打算做...going speaking用在哪里？我觉得这句话也对，go doing sth，例如go hiking等等。一般go doing sth表示去做某事。比如：go hiking 去远足，go shopping 去购物，这些都为固定搭配。没有go speaking 的说法，你总不能说“去说”吧，因为go有“去”的基本意思，所以用在该题中不合适。最合适的就是B在过去的那个时间里，老师打算继续讲下去。过去将来时was/were going to do sth