While ________ to foreigners，you must try your best to make yourself ________.A．

题干

While ________ to foreigners，you must try your best to make yourself ________.

A．spoken…understood	B．spoken…understand
C．speaking…understood	D．speaking…understand

上一题下一题 0.64难度单项选择更新时间:2013-05-17 08:08:07

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