22. Mary__________ really hard on his book and thinks he’ll have finished it by Friday.
A
worked
B
has been working
C
had worked
D
has worked
用现在完成进行时表示从过去到现在一直进行的动作。故选项B符合答案。
根据句意：Marty一直努力写书，我想他到周五为止将已经完成了。。
对时态判断不准确。