题目

_____ his father came back from work_____ his homework.A.Not until; he did      B.It wasn't until; when he didC.It was until; that he didn't do        D.It wasn't until; that he did 答案：D Mary had taken _____ to see that her guests had everything that they could possibly want. 　　A. efforts    B. pains    C. attempts    D. endeavors