In the old days, sending a thank-you note to a relative was easy. You wrote it,【1】, a stamp on the envelope and dropped it【2】a m

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问题     In the old days, sending a thank-you note to a relative was easy. You wrote it,【1】, a stamp on the envelope and dropped it【2】a mailbox.【3】it went in a red-white-and-blue U.S. Mail truck, and【4】of days later the friendly neighborhood mailman walked it,【5】. weather, right to the recipient’s door.
    【6】you’re as likely to send a fax, e-mail, or instant message.【7】you cling to traditional pen and paper, it’s no longer clear 【8】it will travel. Airborne Express? Overnight? Two-Day Priority?
    【9】it moves into the 1st century, the American mail system【10】to survive. In the past few years, the U.S. Postal Service(USPS) has【11】many new services,【12】stamps over the Internet, electronic bill payment, and a service that prints and mails electronic documents Yet revenues depleted by alternative communications (e-mail, electronic banking),【13】with rising fuel and operating costs, led to a $150 million loss in 2000.
    Meanwhile, private carriers are competing【14】business, forcing the Postal Service to contract with the likes of DHL and Emery Worldwide just to maintain its global reach.【15】still delivering 20 percent of the world’s mail, the men and women in the blue uniforms of the Postal Service just can’t seem to【16】.
    The problem is that the U.S. hasn’t【17】grips with the fact that in a fast-changing world, mail delivery is better run as a competitive business than as a government monopoly.【18】many countries have privatized their postal systems, the USPS has attempted to maintain business in both the public and private worlds. It is a semiprivate corporation with a lumbering government bureaucracy. It is【19】by a board of governors【20】a blend of local politicians, small-town business leaders and federal bureaucrats.

选项 A、struggles
B、is struggling
C、struggled
D、has struggled

答案B

解析 is struggling to survive(正为生存而努力拼搏),从时态上看,应该选B,其余选项A.struggles表示一般状况,C.struggled为过去时,D.has struggled为完成时,均不妥。
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