I'm not sure which colors to sample,这句中which colors to sample是什么句子成分阿,高手指点 谢谢
谢谢 多问一下 am 不是be 动词么 那sure应该是表语阿
ok. take a look at this before you will ask further questions:http://zhidao.baidu.com/question/489733379.html?oldq=1