they were swimming in the swimming-pool form 8 to 10 yesterday(改成一般疑问句)

问题描述:

they were swimming in the swimming-pool form 8 to 10 yesterday(改成一般疑问句)

were they swimming in the swimming-pool from 8 to 10 yesterday?

Were they swimming in the swiming-pool from 8 to 10 yesterday?