2. 外语
  3. Can vegetables be planted in winter? Yes, but a greenhouse (暖房) must be【B1】first. The greenhouse should be made【B2】glass. A larg

Can vegetables be planted in winter? Yes, but a greenhouse (暖房) must be【B1】first. The greenhouse should be made【B2】glass. A larg

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问题 Can vegetables be planted in winter? Yes, but a greenhouse (暖房) must be【B1】first. The greenhouse should be made【B2】glass. A large greenhouse may be 10 meters long, 3 meters wide, and 2.5 meters【B3】. The sunshine can reach the vegetable【B4】the class. The wind and the cold air can【B5】stopped from getting【B6】. The air【B7】the greenhouse is always warm. More and more greenhouses【B8】being built all【B9】the world. All【B10】of vegetables can be brought on to our dinner in winter.
选项 A、built
B、build
C、to build
答案A
解析 暖房应该是被建的，因此使用被动态。
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