I ______ on a sofa because my grandparents have come for the weekend.

Every possible means _______to prevent the air pollution, but the sky is still not clear.

Leaders of the BRIC countries-----Brazil, Russia, India and China----_______their second summit on Friday. President Hu Jintao then returned home to help direct relief work ______the deadly earthquake in Qinhai.

– I have got a headache.
--No wonder. You ___in front of that computer too long.

Years ago we didn’t know this , but recent science______that people who don’t sleep well soon get ill.

.It is said that the early European playing-cards ______for entertainment and education.

The young girl sitting next to me on the plane was very nervous.She ______before.

Danny _____ hard for long to realize his dream and now he is popular.

She stared at the painting,wonder where she ____it.

John was given the same suitcase his father and grandfather _______with them to school.