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This company was the first portable radios as well as cassette tape recorders in

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This company was the first portable radios as well as cassette tape recorders in

This company was the first            portable radios as well as cassette tape recorders in the world.

A．producing

B．to produce

C．having produced

D．produced

试题答案

B

标签：radiosportablewellasfirst

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