My sister wants red pants.划线部分为【red pants】(对划线部分提问)

问题描述:

My sister wants red pants.划线部分为【red pants】(对划线部分提问)
Her friends have 28 tennis balls.划线部分为【28】(就划线部分提问)

1.What does my sister want?
2.How many tennis balls do your friends have?