2. 外语
  3. The second paragraph tells us that______ The realization of a cheap and easily delivered vaccine wouldn’t help much in near fut

The second paragraph tells us that______ The realization of a cheap and easily delivered vaccine wouldn’t help much in near fut

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问题 The second paragraph tells us that______
The realization of a cheap and easily delivered vaccine wouldn’t help much in near future even if it were developed soon because______
选项 A、HIV virus is hard to control.
B、the number of people infected grows too fast.
C、it needs a long time to find out if it works successfully.
D、both B and C.
答案D
解析
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