D．Powerful muscles
10. Geophysicists have collaborated with archaeologists and anthropologists to study the magnetic properties of pottery and fireplaces at sites _________-- by early humans.
A．occupied
B．occupying
C．which occupy
D．were occupied
11. _________ technically proficient; it also explores psychological questions.
A．Not only is Barbara Astman’s artwork
B．Not only Barbara Asiman’s artwork
C．Barbara Astman1s artwork,, which is not only
D．Barbara Astman’s artwork not only
12. Although Canada’s Parliament can n
either administer or enforce laws initiate policy, it does have the power to make laws and vote on the allocation of funds.
A．not
B．nor
C．and
D．either
13. Willa Cather considered her novel of life in nineteenth-century Nebraska, My Antonia,_________
A．was her best work
B．her best work
C．her best work it was
D．being her best work
14.First designated in 1970, Earth Day has become an annual international event concerns about environmental issues such as pollution.
A．dedicated to raising
B．dedicated raising
C．dedicates to raise
D．that dedicates to raising
15. In 1992 Albert Gore, Jr., the son of a former United States senator, became Vice President of the United States.
A．who was the forty-fifth
B．and the forty-fifth
C．the forty-fifth
D．he was the forty-fifth
16. Although Christopher Columbus failed in his (A) original goal, the discoveries(B) hedid make were as(C) Important than the route to Asia he expected(D) to find.
17. Martha Graham, a (A)leading figure in modern dance, made she(B) debut in (C)1920 with(D) the Denishawn School.
18. In the United States, the federal government (A) is responsible to(B) regulating the working conditions(C) in factories(D).
19. Jupiter is(A) a gaseous planet with(B) an atmosphere composed most(C) of hydrogen and(D) helium. 
