------_____ have you been swimming?-------Two hours A.When B.Wher_英语解答

------_____ have you been swimming?-------Two hours A.When B.Where C.How long D.How many
选什么,为什么,

人气：172 ℃　时间：2019-08-18 20:43:11

解答

------（C.How long） have you been swimming?-------Two hours.
你游了多久了?游了两小时.
how long用于对一段时间提问.