A.if they were interested in dinosaur
【解析】
宾语从句后面用陈述句语序
Hi,很高兴为你解答!
还有其他疑问的话欢迎一起讨论!为什么，解释一下看到你后来补充的答案，还是选A【解释】the teacher asked the students 后面 + 宾语从句1.因为前面的 asked 是过去时态，所以后面也要用过去时态，所以C和D不对2. 因为是宾语从句，所以要用陈述句，即：if they were interested in dinosaur 如果想选B的话，应该改成whenAlbert Einstein was born谢了