It is well known to us that Zhai zhigang is the first Chinese ast_英语解答

It is well known to us that Zhai zhigang is the first Chinese astronaut ___in space.walk的适当形式
to walk 为什么

人气：236 ℃　时间：2019-08-20 22:54:17

解答

be the first + n.to do sth.这是一个固定的搭配.所以填to walk.