After _______, jack hurried to work.
---- Is it in that factory __________ “Red Flag” cars are produced? ---- No, they are produced in our factory.
We’re talking about the piano and the pianist _____ were in the concert we attended yesterday.
The freezing point is the temperature __________ water changes into ice.
Don’t talk about such things _______ you are not sure about.
Hurry! The train _______. You know it _____at 8:30am. .