He ____not____(see)me come in,for he ____(read)something with great interest.

问题描述:

He ____not____(see)me come in,for he ____(read)something with great interest.
does see ;is reading或did see;was reading 那个对

did see;was reading
这是陈述过去发生的事
说“他没看到(一般过去时)我进来,是因为他当时饶有兴致地再看某样东西(过去进行时).”
不懂追问*^__^*