Nowadays good things _____ to save wildlife in Tibet and many other places with the joint efforts of the government and society.
| A．have done | B．are being done |
| C．are doing | D．will be done |
_____ of the land in that district _____ covered with trees and grass.
| A．Two fifth; is | B．Two fifths; are | C．Two fifth; are | D．Two fifths; is |
The company had about 20 notebook computers but only one-third _______ used regularly. Now we have 60 working all day long.（2006浙江）
| A．is | B．are | C．was | D．were |
The country life he was used to ______ greatly since 1992.
| A．change | B．has changed | C．changing | D．have changed |
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 |
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 |