Thanks to a South Korean drama currently on air, Man From the Stars, this new mix — match junk food trend has become popular among young audiences, _____its unhealthy nature.
While reading, you'd better make a mark ___ you have any questions.
Don't keep your mouth ___ if you want to improve your spoken English.
My classmates, Li Ming, was highly praised for ___ a good deed.
There are many pine trees on ___ of the street.
I don't think this question is worthy ____.