on of arithmetic_____.
(A)can hardly be exaggerated
(B)hardly exaggerated can be
(C)can be exaggerate hardly
(D) exaggerated can be hardly
3．______ is present in the body in greater amounts than any other mineral.
(A)Calcium
(B) There is calcium
(C) Calcium, which
(D)It is calcium
4．_______ the evidence is inconclusive, it is thought that at least some seals have an echolocation system akin to that of bats, porpoises, and shrews.
(A)Rather
(B)Despite
(C)Although
(D)Why
5．The total mass of all asteroids in the solar system is much less ______ mass of Earth’s Moon.
(A)than that is the
(B)than the
(C)the
(D)is the
6．Like bacteria, protozoans _______by splitting in two.
(A)reproducing
(B) reproduce
(C)to reproduce
(D) reproduction
7．______main processes involved in virtually all manufacturing: extraction,assembly,and alteration.
(A) There are three
(B) Three
(C) The three
(D) Three of the
8．Most documentary filmmakers use neither actors _______studio setting.
(A)or else
(B)but not
(C) nor
(D)and
9．Salamanders are sometime confused with lizards, but unlike lizards ________no scales or claws.
(A) hat they have