填空题

When was the umbrella first used by Chinese
It was first used by Chinese in the （）

【参考答案】

the eleventh century B. C.

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单项选择题

A．15 dollars.
B．30 dollars.
C．45 dollars.
D．60 dollars.

填空题

I saw the man (knock) ______ down by a ear in the street.

When was the umbrella first used by Chinese It was first used by Chinese in the （） 您的浏览器不支持 audio 元素。