单项选择题

The reason why poverty is one of the factors affecting the impacts of AIDS in Africa is that ______.

A．it's the biggest problem in Africa and leads to other problems
B．it makes it difficult for individuals and governments to fight the disease
C．the starving people are easier to be infected by AIDS
D．the AIDS pandemic can't afford the treatment because of poverty

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单项选择题

By saying It's a two-horse race (Line 6, Para. 4), the author indicates that

A．the principals of those two schemes mentioned above are competing with each other
B．there are mainly two retailers of personal tax software in the present market
C．Intuit's Turbo Tax and H&R Block's Taxlut are the names of two horses known by everyone
D．those smaller retailers will be merged into the bigger ones in the nearest future

单项选择题

In another new scheme, a telephone caller ______.

A．was an IRS employee and sent useful information to military families
B．told the family members that they would be given a special reward
C．asked for the listeners' credit card numbers to buy things crazily
D．warned the families of the latest deception found by IRS employees