He___________ when the bus came to a sudden stop.

16．—Where is Lily, Lucy? I cannot find her anywhere. —She_________have been off long. I saw her clean the window just now.

What does P．O．_________?—-Poster order, I guess．

Reading is an experience quitedifferent from watching TV; there are pictures ____inyour mindinstead of before your eyes.[ ]

As US President Barack Obama _____London, fresh figures showed US house prices were falling at their fastest pace on record.