2. 外语
  3. Severe winter storms have worsened the nation’s usual post-holiday blood shortage,【C1】________an urgent call today for people to

Severe winter storms have worsened the nation’s usual post-holiday blood shortage,【C1】________an urgent call today for people to

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问题     Severe winter storms have worsened the nation’s usual post-holiday blood shortage,【C1】________an urgent call today for people to donate blood. Type O blood is the most urgently needed, because it is the【C2】________blood type, meaning it can be safely【C3】________to most people in an emergency. "The severe winter weather has forced the cancellation of blood drives and limited our【C4】________to collect blood," American Red Cross President Elizabeth Dole said. The Red Cross reported having less than one day’s supply of Type O blood on hand in 18 of the organization’s 38 collection regions. The Red Cross【C5】________about half of the nation’s blood supply. America’s Blood Centers, which supplies most of the rest, also has reported shortages.
    Reacting to the shortage, a Pittsburgh blood bank asked 40 hospitals in western Pennsylvania, West Virginia and Ohio to【C6】________elective surgeries through Wednesday. At least 1,000 donors are needed each day for the next several days to stabilize the supply, said Mark Lynch, spokesman for the Central Blood Bank. "We’re talking about (postponing) hip replacement, for example, and orthopedic cases. These are sick people who need surgery, but it’s not life【C7】________," he said. When its blood supply is【C8】________, the blood bank needs about 700 donors each day to maintain normal inventory. The Pittsburgh blood bank last asked hospitals to postpone elective surgeries because of a blood shortage in October 1995. Such procedures were canceled for almost a week.
    Nationwide, donations typically fall off during the holidays, when donors become too busy to give blood【C9】________. Bad weather increases shortages both by【C10】________blood drives and by causing increased blood demand to treat accident victims.
    A) threatening    F) ability       K) immediately
    B) popular        G) universal     L) prompting
    C) postpone       H) refuse        M) blocking
    D) regularly      I) transfused    N) density
    E) receives       J) stable        O) provides
【C10】
选项
答案M
解析 该空所在的部分by——blood drives与其后的by causing…victims构成了由连词and连接的并列结构，因此可断定这里需填一个现在分词。符合语法条件的只有现在分词blocking，意为 “阻碍”，所以正确答案是M。
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