Do you know _______ friends are coming to our party?
He lived in a small village, ______ was a long way from the railway station.
Many visitors will have to wait for another two hours ______ the heave rain.
I ______ for Beijing in a few days. Do you know when the earliest plane ______?
The computer centre, ____ last year , is very popular among the students in this school.
When the spaceship was , I could really feel the high gravity.