题文
The first color TV set was considered by most people________this century.
| A．having been invented it | B．one of whom invented |
| C．who had invented it | D．to have been invented |
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The first color TV set was considered by most people________this century.
| A．having been invented it | B．one of whom invented |
| C．who had invented it | D．to have been invented |
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