Fill in the blanks to complete the dialogue. Choose the best option for each blank.

Here are the completed sentences for the dialogue:

• 1. Seller: Hello, can I help you?

  • This is a standard and polite way for a seller to greet a customer and offer assistance.
  • The correct option is B. can I help you.

• 2. Customer: Yes, I am looking for a smartphone.

  • The customer is responding affirmatively to the seller's offer of help before stating their need.
  • The correct option is A. Yes.

• 3. Customer: Let me see. I want the latest Samsung model.

  • This phrase indicates the customer is considering options or is ready to specify their preference after the seller's general offer.
  • The correct option is D. Let me see.

• 4. Customer: How much does it cost.

  • "How much" is the correct phrase used to inquire about the price of an item.
  • The correct option is B. How much.

• 5. Seller: It is a bit expensive. Thirty thousand shillings. But it's worth your money.

  • Given the customer's subsequent response ("I cannot afford to pay that much"), the seller is likely describing the price as high.
  • The correct option is D. expensive.

Here are the answers:

1. $\boxed{\text{B. can I help you}}$
2. $\boxed{\text{A. Yes}}$
3. $\boxed{\text{D. Let me see}}$
4. $\boxed{\text{B. How much}}$
5. $\boxed{\text{D. expensive}}$