__________(7)
A.find
B.had found
C.found
D.founded

__________(8)
A.about
B.among
C.belong to
D.off

__________(10)
A.seldom
B.ever
C.never
D.rarely

According to the passage, the paper that we use was first invented by
A.the Chinese
B.the Egyptians
C.ancient cultures
D.foresters

According to the passage, the primary source of the plant fiber used in paper is
A.rags
B.trees
C.fabric
D.wastepaper

__________(2)
A.book
B.has booked
C.will book
D.booked

__________(5)
A.was not
B.am not
C.haven't been
D.won't be

__________(6)
A.made
B.make
C.was made
D.have made

__________(8)
A.asked
B.was asked
C.have been asked
D.will ask

__________(9)
A.was
B.were
C.have been
D.will be