For all the crowds at World Expo 2010 in Shanghai,the people lined up at every entrance and entered the exhibits________.[ ]

－ ________ does the bridge made of steel weigh －About 90,000 tons.

He is always late for work, and yet nothing is ever said to him. I don’t know how he___________ it.

The doctor did a lot to reduce thepatient’s fear ____he would die of the disease.

My father _______ working on the farm, but he is a driver now.