题目内容
动词填空(Filling in the blanks with verbs)：
While he ________ (sit) in the park, it began to rain.
答案：
解析：
解析：
|
was sitting |
练习册系列答案
相关题目
题目内容
动词填空(Filling in the blanks with verbs)：
While he ________ (sit) in the park, it began to rain.
|
was sitting |