---Did Jack come back early last night?

 ---Yes, it was at eight o’clock_____ he arrived home.

   A. before     B. when   C. that   D. until 

---Did Jack come back early last night?

 ---Yes, it was at eight o’clock_____ he arrived home.

   A. before     B. when   C. that   D. until 

  — Did Jack come back early last night?

— Yes. It was not yet eight o’ clock________ he arrived home.

    A. before          B. when            C. that           D. until

The English play ______ my students acted at the New Year’s party was a great success.

  A. for which         B. at which          C. in which        D. on which

  — Did Jack come back early last night?

— Yes. It was not yet eight o’ clock________ he arrived home.

    A. before          B. when            C. that           D. until

The English play ______ my students acted at the New Year’s party was a great success.

  A. for which         B. at which          C. in which        D. on which