Reportedly yesterday a group of American soldiers were walking along the road in Iraq when a bomb（炸弹） was _____, three of whom were killed.
| A．set about | B．set off | C．set up | D．set out |
Running a company is nota matter of hiring people - they also need to be trained.
| A． | simply | B． | partly | C． | seriously | D． | equally |
Everything was perfect for the picnic ______ the weather.
| A．in place of | B．as well as | C．except for | D．in case of |
Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.
| A．sense | B．view | C．means | D．idea |
American Indianabout five percent of the U.S. population.
| A． | fill up | B． | bring up | C． | make up | D． | set up |