A: Hi , Randall,Come on in .

B: Uh, yeah, I     by to see if you       for a roommate to share your house.

A．stopped; were still looking

B．will stop ;are still looking

C．have stopped ; were still looking

D．stop ; will have looked

请分析本文提出的在市场经济中的诚实信用原则。
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1、运用掌握的法学和社会知识阐释你的观点和理由；
2、说理充分，逻辑严谨，语言流畅，表达准确；
3、字数不少于500字。