I (enclosed) my paper (in)the envelope and posted it to the professor

问题描述:

I (enclosed) my paper (in)the envelope and posted it to the professor
contest?还是put inside?

put inside
1.enclosed 是 close的动词化 如 enlarge的en用法一样
2.再根据意思
“把信 %… 到信封里然后寄给教授”
所以只能解释为 put inside