题目内容:
They overcame all the difficulties and fulfilled the project seven days ahead of schedule,__________was something we had not expected.
A.that
B.this
C.it
D.which
参考答案:
答案解析:
They overcame all the difficulties and fulfilled the project seven days ahead of schedule,__________was something we had not expected.
A.that
B.this
C.it
D.which