问题补充：
单选题
The students running on the playground are all in their uniforms, so it’s hard for you to my sister in them.A.take upB.take outC.pick upD.pick out
网友答案：
热心网友 1楼
D解析词义辨析。take up占据；take out 取出；pick up拾起，捡起；pick out认出。句意：操场上跑步的学生都穿着校服，所以你很难从他们中认出我的妹妹。选D。
