By the end of last week, we __________ a satisfactory solution to the problem.
It was the training ________ he had as a young man ________ made him so excellent.
Not until she took off her dark glasses ________ she was a famous film star.
It is ten years since we ________ each other last time.
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
It is usually warm in my hometown in March, but it ________ be rather cold sometimes.