buy leads 是买还是卖啊?

Buy two get one free是买2送1的意思还是买1送1啊? rarely怎么用?我很少买一些水果是I rarely buy some fruit.还是I rarely buy an 买东西分期付款是buy~on instalment还是buy~in instalment 是What should i buy 还是What shall i buy? 是why not buy some还是why not buy any 是let's buy thing还是let's buy things He needs money to buy a book不定式是做定语还是目的状语 他需要买书的钱 他需要钱为了买书 好 BUY SB STH买某物给某人.那这个呢：你去买水.BUY YOU WATER还是BUY YOUSELF WATER? “A complete plan leads to a great success”这句话对吗?,leads to好还是 音标baI是写BUY还是BYE what leads to success?还是what lead to success? what is the most important factor that leads you to buy some