29. Imagine ___with someone who never stops ___practical jokes on you.(本题1.0分) A、 to live, to play B、 to live, playing C、 living, to play D、 living, playing
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21. This is the university___.(本题1.0分) A、 at which
21. This is the university___.(本题1.0分) A、 at which do we study B、 we are studyin