2. 外语
  3. The snow storm may come at any time. It is essential______in case of a blackout.

The snow storm may come at any time. It is essential______in case of a blackout.

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问题 The snow storm may come at any time. It is essential______in case of a blackout.
选项 A、for us to store enough food, water and fuel and buy a generator
B、that we have stored enough food, water and fuel and bought a generator
C、of us to store enough food, water and fuel and buy a generator
D、that we must store enough food, water and fuel and buy a generator
答案A
解析 固定句型题。it is adj.+for sb．to do sth．为固定句型。选项B、D应该用虚拟语气“should+do”的形式，故均排除。在it is adj.+of sb．to do sth.中，adj.应是指sb．的性格、品质，故排除C。
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