win the first prize in the nationalcompetition, _______ he is likely to be admitted to Peking University

Sheuntil his mother got back home.That’s why she was so tired.

_____ I was on a train and a Chinese university lecturer told me a story about his sister and brother-in-law.[ ]

The Internet plays _______ an important part in our society _______ it has influenced our life

The computer system _______suddenly while he wassearching for information on the Internet