英语语法:On hearing a great noise,Mike looked forward through the window _____ what happened.B.to seeD.to have seen问:不定式的完成时在什么情况下使用?要使D正确,原句可以如何更改?
问题描述:
英语语法:On hearing a great noise,Mike looked forward through the window _____ what happened.
B.to see
D.to have seen
问:不定式的完成时在什么情况下使用?要使D正确,原句可以如何更改?
答