13.About 90 percent of the equipment presented by the administration,as well as the facilities of our own, ______made good use of in teaching.
A.have | B.has | C.have been | D.has been |
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 |