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
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
C
此题考查动词时态。根据句意“截止到他意识到的时候，他已经走进了一个陷阱”以及by常和完成时连用可排除A,B。而且realize用一般现在时的单数第三人称形式，以及后句中用一般将来时，所以选C。