—Can I help you，dear?
—Yeah，I don’t know        a banana milk shake. Maybe you can teach me.

—Can I help you，dear?

—Yeah，I don’t know        a banana milk shake. Maybe you can teach me.

A．what to do

B．when to make

C．how to make

D．why to do

--Can I help you，dear?

--Yeah，I don't know _______a banana milk shake．Maybe you can teach me．

A．What to do       B．when to make       C．how to make       D．why to do

—Can I help you，dear?

—Yeah,l don't know　　　　　　　　a banana milk shake. Maybe you can teach me.

A. what to do　　　　　　B.when to make　　　　C.how to make　　　　D.why to do

—Can I help you，dear?

—Yeah,l don't know　　　　　　　　a banana milk shake. Maybe you can teach me.

1. A.
   what to do
2. B.
   when to make
3. C.
   how to make
4. D.
   why to do

—Can I help you，dear?
—Yeah,l don’t know　　　　　　　　a banana milk shake. Maybe you can teach me.