【題目】The physics teacher once said that as __________ well-known, thunders __________ make electricity.

A. is; can B. was; could

C. was; should D. be; can

【答案】A

【解析】句意：物理老師曾經(jīng)說(shuō)過(guò)，眾所周知,雷能發(fā)電。as is well-known眾所周知；can表示理論上的可能性。

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