. In the past few years there ______ great changes in my hometown.
Smile to the world, ___________ the world will smile back to you.
—What do you often pay attention to when you learn English? —___________.
The lady ________ dancing as a hobby in her sixties, and she is really good at it now.
In the old days, cows ________ farm work.
I did so much ________ my dream.