make-up什么意思（初中英语）

When I am in the street,I often see a group of students in school uniforms.I am surprised_____that the girls' skirts are very short, and they wear a lot of make-up.
都非常简单的空，帮填一下。还有最后一句里的make-up什么意思？
第二行不是wear，是空格，打错了

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