_______seems to have been a strong competition in China for school leavers to enter college or university.
_____do they play foodball?—Once a week.[ ]
Would you like ____ with me? I have two tickets for the film.
When did you start to collect stamps?— I got my ______ stamp when I was ______ years old.
The Gulf of Mexico (墨西哥湾) is being polluted seriously. That has affected _______ several hundred kinds of sea animals there. [ ]