89. He was so tired that as soon as he laydown he fell _______ asleep.

s full of ups and downs. ________ that we are optimistic and take a positive attitude, we will be more likely to enjoy our life to the fullest.

Elephants can remember the places _______ food and water.

have plenty of time tomorrow, soyou work too late tonight

The Shanghai World Expo is intended to achieve ourcommon goal, world that is safer, cleanerand healthier than one we’re living in.