Sally is _______ in class now , but she used to be a very shy girl.

She brought with her three friends, none of _____ I had ever met before.

____ the dangers of smoking to their health,smokers still find it hard to give up smoking

ine bought a postcard of the placeshe was visiting, addressed _______ to _______ and then posted it at the nearbypost office.

In the past 30 years China ______ great advances in the socialist revolution and socialist construction