用正确的介词或副词填空：

The problem ________ electrical signals is that they get weaker and weaker.

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They have charged us separately ________ the service.

用正确的介词或副词填空：

________ other words. you can walk to a distant part to check the information.

用正确的介词或副词填空.

At the beginning it was difficult to hear people________ long distances.

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All the best ________ you ________ your business.

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We must get together some other time ________ a chat.

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Hold ________. I'll go and get her.

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Would you like a word ________ her?

用关系代词或关系副词填空

She heard a terrible noise, ________ brought her heart into her mouth.

用关系代词或关系副词填空

This is the mountain village ________ I stayed last year.