Subject questions, questions with preposition

1 Anna lives with her grandmother. ⇒ Who ?

2 My brother is talking to Lisa right now. ⇒ Who ?

3 Somebody stole my phone yesterday. ⇒ Who ?

4 We are waiting for the bus. ⇒ What ?

5 Mark usually sits next to Sarah in class. ⇒ Who ?

6 The children are playing with a ball. ⇒ What ?

7 Someone called you this morning. ⇒ Who ?

8 She goes to school by bike. ⇒ How ?

9 Tom is looking at the pictures on the wall. ⇒ What ?

10 My parents are worried about my exam results. ⇒ What ?