Choose the right variant:

Listen! My friend … the song. (sing, sings, is singing)

I … some problems at school. (have, has, am having)

They … to visit galleries and museums. (likes, are liking, like)

Where is Mum? She … . (cooks, cooking, is cooking)

I can … a lot of girls in the street. (am seeing, sees, see)

His brother … the piano very well. (play, plays, is playing)

Look! They … to the library now. (go, are going, is going)