（2015•青岛）—How many times Carl to the Great Wall? —Only once.

题型：单选题题类：真题难易度：普通

—How many times Carl to the Great Wall?

—Only once.

A、 does ;go B、 did; go C、has; gone D、has; been

举一反三

-- For about an hour, yes, it finished an hour ago.

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My uncle{#blank#}1{#/blank#}his hometown for quite a few years.

—Yes，I read the novel first.The writer Liu Cixin has ____ the world with his works.

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