When he turned professionparents.

In a time of social reform, people’s state of mind tends to keep ____ with the rapid changes of society.

ited States signed up on Friday forthe 2010 Shanghai World Expo, _________ it the last major country to join theevent．

heard that your daughter had been admitted by a famous university.—But they charge so high tuition.I can’t _________such a large sum.

It was quite a long time ______ I figured outwhat had happened to the manager