问题
选择题
By the time he realizes he _____ into a trap, it'll be late for him to do anything about it．
A．walks
B．walked
C．has walked
D．had walked
答案
答案：C
搜题请搜索小程序“爱下问搜题”
By the time he realizes he _____ into a trap, it'll be late for him to do anything about it．
A．walks
B．walked
C．has walked
D．had walked
答案：C