For this class you just need good shoes. / Can you tell me...?
Can you tell me what I need for this class?
The yoga class is in Room 2. / Can you tell me...?
Can you tell me where the yoga class is?
The monthly fee is $70. / Do you know...?
Do you know how much the monthly fee is?
Yes, the swimming class started at 8:00. / Do you know...?
Do you know if the swimming class started at 8:00?
The aerobics instructor is Jane. / Do you know...?
Do you know who the instructor is?