— He is a very hard-working student.— .As far as I know, he often burns the midnight oil.
—How many people attended the exhibition?—I’m not sure. _____ speaking, a thousand or more.
Catherine didn’t like her roommates, because they _____ things from her.
There is no doubt that the increase in demand _____ the rise in prices.
You have to believe in yourself. Self-confidence is _____ to success.
We can’t go to the concert. _____, it’s too cold. Besides, we’ve no tickets.