The outbreak of swine flu that was first detected in Mexico was declared a global epidemic on June 11, 2009. It is the first worldwide epidemic (1) _____ by the World Health Organization in 41 years.

    The heightened alert (2) _____ an emergency meeting with flu experts in Geneva that assembled after a sharp rise in cases in Australia, and rising (3) _____ in Britain, Japan, Chile and elsewhere.

    But the epidemic is “ (4) _____ ” in severity, according to Margaret Chan, the organization’s director general, (5) _____ the overwhelming majority of patients experiencing only mild symptoms and a full recovery, often in the (6) _____ of any medical treatment.

    The outbreak came to global (7) _____ in late April 2009, when Mexican authorities noted an unusually large number of hospitalizations and deaths (8) _____ healthy adults. As much of Mexico City shut down at the height of a panic, cases began to (9) _____ in New York City, the southwestern United States and around the world.

    In the United States, new cases seemed to fade (10) _____ warmer weather arrived. But in late September 2009, officials reported there was (11) _____ flu activity in almost every state and that virtually all the (12) _____ tested are the new swine flu, also known as (A) H1N1, not seasonal flu. In the U. S., it has (13) _____ more than one million people, and caused more than 600 deaths and more than 6,000 hospitalizations.

    Federal health officials (14) _____ Tamiflu for children from the national stockpile and began (15 ) _____orders from the states for the new swine flu vaccine. The new vaccine, which is different from the annual flu vaccine, is (16) _____ ahead of expectations. More than three million doses were to be made available in early October 2009, though most of those (17) _____ doses were of the FluMist nasal spray type, which is not (18) _____ for pregnant women, people over 50 or those with breathing difficulties, heart disease or several other (19) _____. But it was still possible to vaccinate people in other high-risk groups: health care workers, people (20) _____ infants and healthy young people.

答案精析：动词辨析题。空格所在句前面由though引导了一个让步状语从句，指出了疫苗的局限性，后文的But又表示转折，说明该药剂可以用于其他高危人群，所以本句应该在说药剂不能用于某些人身上。根据语意，尽管最初的剂量大多是鼻腔喷雾剂，不 孕妇、超过50岁的人或患有呼吸困难、心脏病或其他一些问题的人使用。但仍有可能给其他高危人群接种疫苗。根据逻辑可以推断出，这些药剂是不推荐给孕妇等人使用的，故本空应填入recommended。

错项排除：A项presented代入空中不符合文意，且通常与with或to搭配，故A错误。B项restricted和D项introduced通常和to搭配，不和for连用， B、D两项在语法上不符，故排除。

长难句分析：More than three million doses were to be made available in early October 2009, though most of those initial doses were of the FluMist nasal spray type, which is not recommended for pregnant women, people over 50 or those with breathing difficulties, heart disease or several other problems.

本句主干为More than three million doses were to be made available…，为主系表结构。第一个逗号后的though引导让步状语从句，of the...type作该状语从句中的表语，相当于一个形容词。which引导定语从句，修饰type，用于解释这种药剂类型不适用的人群。句末的with…为后置定语，修饰those，用于具体解释第三类不适用的人群。

句意为：2009年10月初将提供300多万剂，但大多数初始剂量为鼻腔喷雾剂，不建议孕妇、50岁以上的人或有呼吸困难、心脏病或其他问题的人使用。