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By the end of this century intelligent robot ______ to do most of the housework
By the end of this century intelligent robot ______ to do most of the housework
游客
2023-11-18
37
管理
问题
By the end of this century intelligent robot ______ to do most of the housework for man.
选项
A、is expected to be invented
B、will have been expected to be invented
C、has been expected to be invented
D、is expected to have been invented
答案
D
解析
动词时态题。by the end of this century决定本句时态应该使用“将来完成时”。而句子中的谓语动词 expect表示的“人们现在的一种期望”,因此不能使用完成时。而动词invent则表示“到本世纪末被期望完成的动作”,因此完成时应体现在动词invent上。故D 正确。
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