Idon’tknowwhenhe      .Whenhe      ,Iwillletyouknow.  A...

问题详情：

I don’t know when he       . When he       , I will let you know.

   A. Will arrive; will arrive   B. arrives ；arrives  

    C. will arrive ；arrives    D. arrives ；will arrive

【回答】

C

知识点：动词时态

题型：选择题