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
4.Traditional folk arts of Tianjin like paper cutting ______ at the culture show of the 2010 Shanghai World Expo.
A. are exhibiting
B. is exhibiting
C. are being exhibited
D. is being exhibited