after working for two hours,i found it impossible' to complete the paper in time.it处可以用that吗?为什么?

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/01 01:20:37

after working for two hours,i found it impossible' to complete the paper in time.
it处可以用that吗?为什么?

不能 it在此为形式主语