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【题目】Look at this machine.Do you know who it was invented______ ?

A. forB. byC. toD. from

【答案】B

【解析】

句意:看这台机器。你知道它是被谁发明的吗?A. for因为;B. by通过;由……,被……;C. to到;D. from从,根据题意“机器是被发明”,在被动语态中,由by引出动作的执行者。故选B。

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