(单选题)
By the time he realizes he ______ into a trap, it’ll be too late for him to do anything about it.
A.walks
B.walked
C.has walked
D.had walked
参考答案:C
参考解析:
考查现在完成时。句意:到他意识到已经进入一个圈套的时候,对于他来说做任何事情也都为时已晚了。根据句意可知,he ______ into a trap充当realizes的宾语从句,“走进一个陷阱”发生在realize之前,强调对现在的影响,应使用现在完成时。故选C。
知识点: