Your secret letter must ________ in a safe place.A. be kept B. kept C. is kept
Xi’an is a city with many places of interest and _____ tourists come here every year.
Sixty percent of all Chinese are farmers and they are than people who live in the cities.
I used to . But now I get used to doing everything. I’m successful at last.
— Would you like to talk with your father or mother, Liu Mei? — We don’t have the same topic(话题).
China has the _____ population in the world.