______ does ______ packet of chips cost?

How do you improve your listening, Mary? —Just ______ listening to tapes, it’s a good way, you know. [ ]

He was admitted to a famous university，________ was obvious that his situation had gone beyond his parents’ expectations.

a year does your school have sports meetings?—Twice a year.

When has the country been open to internationaltrade?—_____1978 , Isuppose