1.The factory used 65 percent of the raw materials, the rest of which _______ saved for other purposes.
A. is
B. are
C. was
D. were
2.One-third of the country _______ covered with trees and the majority of the citizens ______ black people.
A. is; are
B. is; is
C. are; are
D. are; is
3.It is reported that many a new house ________ at present in the disaster area.
A. are being built
B. were being built
C. was being built
D. is being built