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第1题

He began to feel hungry since the previous evening. A、 not having eaten B、 not have eaten C、 not eating D、 having no
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第2题

The driver was at______loss when______word came that he was forbidden to drive for speeding. A、 a; / B、 a; the C、 the
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第3题

There was a knock at the door again, and it was the second time someone ________ me that evening. A、 has interrupted B
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第4题

有极继电器根据线圈中电流极性不同具有___和___两种稳定状态。
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