________ if you want to do something, or you won’t be able to do it well.
Who ________ that played a trick on the new English teacher?
Where do you think ________ we can buy that bestseller?
There is no doubt that eating organic food will make you healthier, ________?
It was today's activity ________ let me know the importance of teamwork.
—Why wasn't John hired for the job? —I don't know, but he ________.