--Can I help you?

-- ________

A．Yes，you can．                        B．Yes，please．I want a t-shirt．

C．No，you can't．                       D．Ok，here you are．

--Can I help you?

-- ________．I want a sweater．

A．You can          B．Yes，please          C．I don't know           D．No，you don't

--Can I help you?

-- ________．I want a sweater．

A．You can               B．Yes，please            C．No，you can't

--Can I help you? 

--        ．

A．Yes，you                    B．No，you can’t   

C．I’d like a pizza                 D．I like a pizza

一Can I help you? 

一_________．

A．No，please don’t          B．Yes，please               C．You're welcome