10. By the middle of the 21st century , the vast majority of the world’s population ________ in cities rather than in the country.
I don’t think it is difficult for a senior student to ________ the difference between “hurt” and “injure”.
We tried to find a seat on the bus, but they were all_________.
—Will it rain tomorrow? —I _____.
---- I was riding along the street and all of a sudden, a car cut in and knocked me down. ---- You can never be _______ careful in the street.
Can you image that the CEO of Pu Tian Software Company doesn’t __________ dress?