一道英语选择题.知道的讲下,谢谢The present population of this city is three times（ ）it was ten years ago.A. what B. sinceC. that D. as答案是A为什么不是C?

一道英语选择题.知道的讲下,谢谢The present population of this city is three times（ ）it was ten years ago.A. what B. sinceC. that D. as答案是A为什么不是C? 一道英语选择题= Who is playing the piano in the next room?( ) is Li's brotherA.This B.That C.It D.He讲下理由、谢。 一道英语选择题the noise of thendog makes meAannoy Bannoyed求选一个且讲排除林一个的理由 一道很简单的英语选择题cotton___in the northwest of America填grows还是is grown要说理由,谢谢 初二英语,一道选择题,急要,谢谢 ! 一道选择题,初一的数学,谢谢啦 问一道选择题 谢谢! the air pollution makes many people feel...英语选择题一道the air pollution makes many people feel___Abad Bsick为什么?谢谢 八下的英语选择题 一道英语虚拟语气选择题.James wishes he ＿the football game instead of the film A saw B see C hadbeenseen D hadseen 我是英语白痴,请讲的详细一点为什么.本人万分感谢. 初二英语第一题,一道简单的选择题说明理由谢谢 初二英语12题一道简单的选择题请说明理由谢谢 一道不定积分的题目 36与38题 讲下思路也好谢谢 一道英语过去完成时的选择题,有点困惑 一道英语单项选择题,不懂可以说下原因吗 一道物理题：电阻的大小能不能改变电压的大小?拜托知道讲下, 英语选择题,考虑清楚哦!好像很奇怪的一道题!说下原因吧!谢谢Everyone should do ______ duty,shouldn't ______? A.one's; his B.his; he C.their; they D.his; they原因!谢谢! 英语选择题一道