关于不定代词的一道题目.If you want to change for a double room you’ll h

关于不定代词的一道题目.If you want to change for a double room you’ll have to pay __﹩5.
If you want to change for a double room you’ll have to pay __﹩5.
A.another B.other C.more D.each
为什么选择A.详细解答其他三项为什么不能选.