The old couple often take a walk after supper in the park with their pet dog them. [ ]

Liu Yang is the first Chinese woman astronaut has ever traveled in space.

Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

Can you spare time to come to our Christmas — Well, I don’t know ________

The girl felt nervous at the stage with a lot of audience _______her.