I think the company should inform its customers _______the improvements in their services.
A.on
B.about
C.to
D.with

________(37)
A.says
B.states
C.claims
D.tells

________(38)
A.proof
B.sign
C.evidence
D.indication

________(40)
A.exposed
B.unearthed
C.dug
D.devised

________(42)
A.line
B.means
C.way
D.method

________(43)
A.sense
B.importance
C.meaning
D.understanding

The word “hidden” in paragraph 1 is closest in meaning to
A.undrinkable
B.untouched
C.unexploitable
D.undiscovered

Which of the following is closest in meaning to “frigid” in paragraph 1?
A.Extremely cold
B.Easily broken
C.Quite harsh
D.Lukewarm

A ll of the following are true about the 1970 survey of AntarcticaEXCEPT that it ______
A.was conducted by air
B.made use of radio waves
C.could not determine the lake’s exact size
D.was controlled by a satellite

The word “microbes” in paragraph 3 could best be replaced by which of the following?
A.Pieces of dust
B.Tiny bubbles
C.Tiny organisms
D.Rays of light