填空题

In the past, who used steamboats？
The （） and the manufacturers.

【参考答案】

farmers

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填空题

He showed Carrie around in his laboratory to (satisfaction) （） her curiosity.

单项选择题

A．Operating computers.
B．Doing business.
C．Operating fax machines.
D．Typing.

In the past, who used steamboats？ The （） and the manufacturers. 您的浏览器不支持 audio 元素。