2. 公务员
  3. The government has taken some measures to solve the sho~age of electricity，but it may besome time( )we have enough power．

The government has taken some measures to solve the sho~age of electricity，but it may besome time( )we have enough power．

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问题 The government has taken some measures to solve the sho~age of electricity，but it may besome time( )we have enough power．
选项 A、since
B、after
C、unless
D、before
答案D
解析 “It is+段时间+before…”意为“要过多长时间才……”；其否定形式“It is not+段时间+before…”意为“要不了多长时间就……”。
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