By saying 'the world may end up making a go of elimination this time'(Lines 4-5, Paragraph 6), the author implies that the world may
A．manage to eradicate polio.
B．fail to achieve the eradication of polio.
C．give up the goal of eradication of polio.
D．begin to eliminate polio.

判断题词的本义在一组词义中只有一个，而引申义的数量可以很多。()

未分类题Which of the following is true according to the second paragraph?A．It is the audience problem that leads to feature creep.B．What matters to designers and marketers is not good for consumers.C．Feature creep brings blessings to the people in marketing and sales.D．The engineers will not pay attention to the quality of the products.

判断题单注本是与原书别行的注本，不包括单疏本。()

未分类题Companies find it difficult to avoid feature creep because consumersA．find complex gadgets easy to manage.B．are attracted by gadgets with more features.C．do not like the gadgets featured by simplicity.D．know the virtues of complexity very well.

未分类题Muslims in northern Nigeria is cited as an example to show thatA．eradication of polio has been hampered by the conspiracy of Muslims.B．eradication of polio met many obstacles there.C．vaccination program was harmful to the children there.D．vaccination program strengthened and spread virus.