用所给词的适当形式填空.紧急!1、Mr Li ( )(teach) English since september,20
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Mr Li ( has been teaching )(teach) English since september,2001.2、They ( have been waiting )(wait) for the bus for half an hour,and they get kind of angry now.3、---( Have ) you ( been writing ) (write) the book for two years?---Yes,I've been writing it since 2008.4、--- How long ( have )you ( been collected ) (collect) old coins?---For about twenty years.5、( Did ) you ( go ) (go) to the cinema yesterday?

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