一道小六普通的英语题.1.\x05While she ________ (sit) in the library,someone ________(throw) a letter through the window.解释一下为什么用一般过去时，或者过去进行时.我觉得是 was sitting，threw 对不？
问题描述：
一道小六普通的英语题.
1.\x05While she ________ (sit) in the library,someone ________(throw) a letter through the window.
解释一下为什么用一般过去时，或者过去进行时.
我觉得是 was sitting，threw 对不？
答