看一看这句英文有无语法错误Bytheendoftwenty-firstcentury,thecomputeranecessityineveryhome.A:willhavebecomeB:hadbecome答案是A因为题目可能出得很早,但是我觉得B可能也是对的.

Question

看一看这句英文有无语法错误
By the end of twenty-first century,the computer_____a necessity in every home.
A:will have become B:had become
答案是A因为题目可能出得很早,但是我觉得B可能也是对的.

Answer 1

If you use B,then it means that right now is the 22nd century...Since it's not...A is the correct answer.I agree with the person who posted before.-Written by a native speaker of English.