2. 公务员
  3. "The key to ______ the medical problems at the roots is health care reform," said the minister.

"The key to ______ the medical problems at the roots is health care reform," said the minister.

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问题 "The key to ______ the medical problems at the roots is health care reform," said the minister.
选项 A、solve
B、solving
C、being solved
D、be solved
答案B
解析 the key to doing sth．为固定搭配，意为“关键在于……”，故答案选B。
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