I saw two birds _____(fly)high.

问题描述:

I saw two birds _____(fly)high.
The bus ran from Tianjin to Beijing without _______yesterday.
The boat is made ______Lucy.
那个......能不能说说原因

see sth.do sth.看见某物做了某事
see sth.doing sth.看见某物正在做
那么原句用的过去式用do.sth 更合适一些
fly
stopping ( without doing固定搭配)
by
选择你喜欢的呗呵呵,其实答案都一样的