1. c             

2. b             

3. a            

4. d

Transcript:

1. A: What do you do in the morning, Tom?

B: I clean the floor.

2. A: What do you do at noon, Linda?

B: I help my mother with the cooking.

3. A: When do you wash the clothes, Nam?

B: In the afternoon.

4. A: What do you do in the evening, Mai?

B: I wash the dishes.