In winter the small town is often _____ from the rest of the world.

If you don’t go there， ．

Do you have any plan for this summer vacation, Mary—- Sure, I’ d like to be a volunteer and help to ______ the Central Park.

Where is your father —He ______Shanghai on business for several days.

Lily is so shy that whenever she is introduced to strangers, she always at them quickly and then looks down at the ground.