--Life ____ be very hard for people living in the north of Canada as it is very cold there in winter.—Yes, the weather there _____ be as low as 60℃ below zero.
Was it in this hospital _______ she lived for ten years ______ she was trained to be a real nurse.
It was only when the war broke out ______ he began to realize everything was too late.
It was ten years ago ______ we last met in our hometown.
---- Mike, you clean the windows of the classroom this afternoon,_______? ---- But I cleaned them only yesterday.
The young man who we talked a lot about yesterday is unfit for the work, _____?