Question 23: The laptop is not working because you haven't charged it yet.

Answer: B
Explanation: "Charged" is the correct verb for providing power to a laptop.

Question 24: I have had this washing machine for five years now. It looks old, but it still works well.

Answer: D
Explanation: Present perfect ("have had") is used to describe an action continuing up to the present.

Question 25: You can send and receive e-mails from a smartphone.

Answer: C
Explanation: A smartphone is commonly used to send and receive emails.

Question 26: Modern smartphones nowadays do not have many buttons to look better.

Answer: A
Explanation: Smartphones are designed with minimal physical buttons for aesthetics.

Question 27: Dung spilled his coffee on his desk and so now there is a stain on the desk.

Answer: D
Explanation: A "stain" refers to a mark left by spilled liquid.

Question 28: Be careful when using electrical equipment.

Answer: A
Explanation: "Equipment" refers to tools or devices used for specific purposes.

Question 29: Lien should install this software on her smartphone. It helps to make her photos more beautiful.

Answer: B
Explanation: "Software" refers to programs installed on devices to perform tasks.

Question 30: If you have an e-book reader, you don't have to bring all those heavy books in your bag.

Answer: B
Explanation: An e-book reader is a lightweight device for reading digital books.

Question 31: I think this is a hardware problem. The computer screen is broken.

Answer: A
Explanation: "Hardware" refers to the physical parts of a device, such as the screen.

Question 32: A robot vacuum cleaner is a helpful device in your home. It makes housework less tiring.

Answer: C
Explanation: "Helpful" describes something that is useful or assists in tasks.

Question 33: It is convenient for you to read e-books when you travel.

Answer: A
Explanation: E-books are portable and accessible for travelers.

Question 34: We can surf the internet to search for news, watch films, or download music.

Answer: B
Explanation: The internet provides access to various forms of online content.

Question 35: If you get a laptop as a reward, what will you use it for?

Answer: B
Explanation: "Use it for" is the correct phrase to describe the purpose of using something.

Question 36: The first actual robot was invented in 1961.

Answer: A
Explanation: The past simple tense "was" is used to indicate an event that happened in the past.

Question 37: Have you reported the shoplifter to the police yet?

Answer: B
Explanation: Present perfect tense is used for an action relevant to the present.

Question 38: Would you like a coffee?" - No thanks. I’ve just had one.

Answer: D
Explanation: Present perfect tense ("I’ve just had") indicates a very recent action.

Question 39: A: Can I try that shirt on? B: Sure. Here you are.

Answer: B
Explanation: "Sure" is a polite way to agree or grant a request.

Question 40: Don’t forget to do your homework before coming to class.

Answer: D
Explanation: "To do" is used after "forget" to indicate an obligation.