An air crash accident happened to the plane, ______.
They had an accident on the road and didn’t ________ at their hotel until after midnight.
He began to take political science__________ only when he left school.
Residents in Wuhan will be__________ to watch horse race every week since it is expected to be open formally in 2010.
I left Jack__________the suitcase while I went to get the tickets.
--How many students are there in your class___________? --Forty-five.