He ____not____(see)me come in,for he ____(read)something with gre_英语解答

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

人气：291 ℃　时间：2020-02-05 07:50:36

解答

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*^__^*