Expo 2010 Shanghai China __________ on both ba{007}nks of the Huangpu River in the city of Shanghai, China, from May 1 to October 31, 2010.
| A．is being held | B．is holding | C．will hold | D．holds |
This printer is of good quality.If it ________ break down within the first year，we would repair it at our expense.
| A．would | B．should | C．could | D．might |
Maybe if I ________ science，and not literature then，I would be able to give you more help.(2011·北京)
| A．studied | B．would study |
| C．had studied | D．was studying |
Sorry，I am too busy now.If I ________ time，I would certainly go for an outing with you.(2012·湖南)
| A．have had | B．had had | C．have | D．had |
—I left my handbag on the train, but luckily someone gave it to a railway official.
—How unbelievable to get it back！I mean, someone ________it.
| A．will have stolen | B．might have stolen |
| C．should have stolen | D．must have stolen |
Jack described his father，who ________ a brave boy many years ago，as a strong－willed man.
| A．would be | B．would have been |
| C．must be | D．must have been |