选A，同意楼上的意见。:) :)

<font size="5"><span style="font-weight: bold;">A.Good morning.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;            用于<span style="color: Blue;">见面时的问候</span>！</span><br style="font-weight: bold;"><span style="font-weight: bold;">B. See you,Wang Lan.    用于<span style="color: Red;">分别时的再见</span>！</span><br style="font-weight: bold;"><span style="font-weight: bold;">C.Nice to meet you .&nbsp;&nbsp; 用于<span style="color: Green;">初次见面时的问候</span>！</span><br style="font-weight: bold;"></font><br><br>&nbsp;逛街时遇到<span style="font-weight: bold;">同学</span>王兰，这个情况用<font size="5"><span style="font-family: Tahoma;">“A.Good morning.”</span></font><br><br><font size="4"><span style="font-weight: bold;">可能不是很合适，但另两个更不合适，相对而言，选A很是比较合适的</span></font><br>