___ a day do you feed your pet?Twice a day 用how long,how many tim_英语解答

___ a day do you feed your pet?Twice a day 用how long,how many times ,还是how often,为啥

人气：295 ℃　时间：2019-08-20 00:26:44

解答

表示频率,用How many times
如果用How often ,应该这样说：How often do you feed your pet?
how long 不能问频率.