You’d better not smoke here, ________?
Students are encouraged to _________ the design competition for robots at the university.
The plan has to be _______ to meet the real situation.
I ______ my university professor in the supermarket near my house, which was out of my expectation.
To qualify yourself for this kind of new job, I recommend that you ________ some online courses.
________ I can see, there is only one way to solve this problem.