—Have you ever heard of Jeremy Lin？
—I only know he is________basketball player．

My friend Frank sings well，and he is________good at playing the guitar．

—Do you know________Amy came to school this morning？
—Her bike was broken，so she had to walk．

________Gian________Tara are studying Chinese history and culture now．They find them rich and amazing．

—We have done a lot to make our city cleaner，but it’s still not enough．
—So we should do________to improve it．