23. The class is unusual_______ the students are all over fifty and none of them attended the middle school when they were young.
—Did you remember to give Marry the money you owed her? —Yes, I gave it to her _______ I saw her.
The man will have to wait all day _______ the doctor works faster.
Although he was in poor health, Robert succeeded ______ other more famous engineers failed.
It was ________ Benazir Bhutto, former Pakistan prime minister, was leaving the rally(集会) that the suicide bomb happened, ________ the world felt sorry.
.---Where’s that report? ---I brought it to you ________ you were in Mr. Black’s office yesterday.