The word "ambiguity” as used in the passage could best be replaced by ______.
A. risk
B. odds
C. uncertainty
D. knowledge
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what is the author's attitude towards so-called entrepreneur？
A. positive
B. negative
C. praiseful
D. objective
Cynthia Beall is going to do more research on ______.
A. why Ethiopians have more haemoglobin
B. why so many world-class endurance athletes are Ethiopians
C. whether the Ethiopians have different kind of haemoglobin
D. whether the Ethiopians have higher concentration of haemoglobin
The success of small businesses lies in ______.
A. innovation
B. uncertainty
C. original ideas
D. risk-taking
One of the reasons why hammerhead sharks can turn more swiftly than sandbar sharks is that
A. big heads
B. slender bodies
C. wide lobes
D. big fins
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