What troubled the teacher was that no one present made an answer when asked who had broken the glasses, so he didn’t know who .
The reason why Daisy eats so little is that she is _________ a diet and she is trying to _______ weight.
-Hello, Mr. Wang. Must we wear the school uniform tomorrow? -You ___________. Only on Mondays. Tomorrow is Tuesday.
The Curies were ___________ the Nobel Prize for their great contributions to science.
-Why haven’t you posted the letter? -I __________ to but I forgot about it.
Often he _________ sit for hours doing nothing at all when he was in low spirits.