根据句意用所给单词的适当形式填空。
（1）Look! Jim is sitting  ___________ . (quiet; quietly)
（2）What’s the matter with ___________? (him; he)
（3）Mary often ___________to the park on Sundays. (go; goes)
（4）My sister likes ___________ very much . (dance;dancing)
（5）The teacher _______________ (is teaching;teach) his students now.