Tom has been in the factory _________he left school.
There are many good stories about the Long March, _________this is the most instructive.
Linda’s parents died when she was a baby, and she was _________by her aunt.
Li Ming is clever, honest, and hard-working. _________, he is a good student and we should learn from him.
_________ in a heavy rain,Robert fell ill and couldn’t help but _________ for a leave.
What is the way George thought of _________ enough money to buy the house?