It was in the street ______ I met John yesterday.
Please give Jim the schedule for tomorrow's conference when he _______ back. He is to chairthe conference.
I'm going to spend the winter vacation in Shanghai,_______I have relatives.
________ you ought to do now is to see a doctor at once.
The medicine is on sale everywhere. You can get it at _______ chemist's.
The sign reads "In case of_______fire, break the glass and push______red button. "