用方框里单词的适当形式完成句子（5分）。

join  teach  sing  friend  good

小题1:My cousin is      at drawing. He can draw very well.
小题2:Mary often makes      with her classmates.
小题3:He wants          the music club.
小题4:Who is       in the next room?
小题5:Mrs.Wang is my favorite teacher. She        us music.