We arrived at the station too early and had togo, so we sat there and chatted with each other.

She _____ an old friend of hers yesterday while she was shopping at the department store.

the books onthe desk, ______ is of any use for study

My grandfather have an old house in _____ they have lived for 70 years.

I was surfing the Internet _____of successfulrendezvous and docking of Shenzhou-VIII and Tiangong-I