单项选择题

If two men suspected for some reason they have a common ancestor, ______ .

A．we can decide according to their family tree
B．we can find the truth from their genetic markers
C．we can compare the differences in their Y chromosome
D．we can look for written records to prove their relationship

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热门试题

单项选择题

The passage is mainly concerned with ______ .

A．the different tastes of people for sports
B．the different characteristics of sports
C．the attraction of football
D．the attraction of baseball

单项选择题

What does the author mean by stating I could have had my eyes closed (Para. 4, last sentence)

A．the third baseman would rather sleep than play the game
B．even if the third baseman had closed his eyes a moment ago, it would make no difference to the result
C．the third baseman is so good at baseball that he could finish the game with his eyes closed
D．the consequence was so bad he could not bear to see it