( )in the sports bag? Two tennis balls A：What are B:What does C:What's D:What do顺便问一下：在不知道答案是单复数的情况下；提问时BE动词用单数还是复数

分类: 作业答案 • 2021-12-19 15:34:29

问题描述：

( )in the sports bag? Two tennis balls A：What are B:What does C:What's D:What do
顺便问一下：在不知道答案是单复数的情况下；提问时BE动词用单数还是复数

答