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 author admits that ______ .

A．baseball is too peaceful for the young
B．baseball may seem boring when watched on TV
C．football is more attracting than baseball
D．baseball is more interesting than football

单项选择题

What does the author mean by stating I could have had my eyes closed (Par

A．4, last sentence)A. the third baseman would rather sleep than play the gameB. even if the third baseman had closed his eyes a moment ago, it would make no difference to the resultC. the third baseman is so good at baseball that he could finish the game with his eyes closedD. the consequence was so bad he could not bear to see it