I can't decide which one to buy 为什么不可以to buy which one

I can't decide which one to buy 为什么不可以to buy which one I can't decide to buy which one, well,I can't decide which one to buy. I can't decide which dress to buy 为什么不可以说是I can't decide to 1.I can't decide which one to buy能不能变成I can‘t decide to buy I can't decide _____.Ato buy which one Bwhich one to buyC to I decide which one to buy.为什么要用which one to buy?而不用which to I can't decide____ A.to buy which one B.which one to buy C.t I can't decide which one to buy now.Let me ___a decision tom I can't decide which one to buy.谁帮我分析一下句子结构 I can't decide which dress to buy.The red one ____is the blu i can't decide which one l should buy