---I don’t know if his uncle ________. --- I think he ________ if it doesn’t rain .
—TV says there will be a storm tomorrow. —___________, I planned to go climbing with my classmates.
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.