对seven提问用什么?

对seven提问用什么? 对for seven years提问 Tom usually goes to school at seven 对当中的at seven提问用英语怎麽说 Seven girls in our class have cats.对seven提问 I am in Grade Seven.对Geade Seven提问 We have seven ctasses every day(对seven提问） Mary is in Grade Seven(对seven提问) Three from ten is seven.(对seven进行提问) they are in class (seven)对seven提问 I want seven yellow flowers. 对seven提问怎么做? there are seven toys on the table用seven提问 it's seven thirty 用what提问