About 60 percent of the students ________ from the south; the rest of them ________ from the north and foreign countries.
Can you think of some cases ___ drivers obviously knew the traffic rules but didn’t obey them?
It is such a difficult problem _______ no one can work out.
–Well, where did you spend your night that day? --At __________.
–Have you seen the film? --Yes. I __________ it three times when I was in Tokyo.
Failure is the mother of success. ______ your courage and you’ll succeed.