Many traditional customs have _____ because they are out of date.
| A．cut out |
| B．died out |
| C．died down |
| D．shut off |
10、______ of the land in that district ______ covered with trees and grass.
| A．Two fifth…is | B．Two fifth…are | C．Two fifths…is | D．Two fifths…are |
9、The number of people invited ______ fifty, but a number of them _____ absent for different
reasons.
| A．were, was | B．was, was | C．was, were | D．were, were |
8、When and where to go for the on-salary holiday ______ yet.
| A．are not decided | B．have not been decided |
| C．is not being decided | D．has not been decided |
7、Every possible means ______ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used | C．has been used | D．have been used |
6、Books of this kind ______ well.
| A．sell | B．sells | C．are sold | D．is sold |