Rick                 :    Look! What is Sarah doing?

  Lucy                :    She's sleeping.

1. Mr. Khan         :    What are the students doing?

  Mrs. Alabama  :    They are doing an experiment in the science lab.

2. Lucy               :     What is the chef doing?

   Sarah             :     He's preparing the ingredients in the kitchen.

3. Sarah             :     What are the students doing?

   Lucy               :     The students are studying in the class.

4. Rick                :     What is Ms. Johansson doing?

   Martin             :      Ms. Johansson is explaining on the whiteboard.

5. Maria              :     What are they doing?

   Elisa                :     They are practicing baseball in the garden.

I hope this helps :) The more you learn, the better you'll get! im sorry if I maybe made some mistakes.