题目内容
【题目】They saw many birds __________ in the tree yesterday. ( )
A.singB.sangC.singingD.sings
【答案】C
【解析】
略
练习册系列答案
相关题目
题目内容
【题目】They saw many birds __________ in the tree yesterday. ( )
A.singB.sangC.singingD.sings
【答案】C
【解析】
略