you should draw with pen,that is,in a pen
问题描述：
you should draw with pen,that is,in a pen
you should draw______pen,that is,______a pen.
with；in
为什么呢
先用in，后用with不行吗
答
意思是 你应该用笔画.这里with pen= in a pen 都是用笔的意思.