___ regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
---I failed today’s math test! What shall I do?---____! Try once more.
He lost his job three years ago; _____, he was seriously injured in an accident last week.
Of all the subjects, I like ____ history best because it gives us ____ useful knowledge of things in the past.
____ of danger in the street at night, she had to go home, with a friend ____ her.
Is there a hospital around ____ I can get some medicine for my wounded hand?