题目内容：

LG’s rolling robots can soon arrive at the largest supermarket chain in South Korea. The tech giant has inked a deal with grocery retailer E-Mart to develop self-driving carts that can follow customers around the store.

The device will be developed under LG’s CLOi brand, which has let other robots go for other uses.

LG hopes the smart cart robot will free shoppers from the usual trouble of having to push their grocery cart around as they examine the ways for passing carefully.

“The LG CLOi CartBot get rid of the worst part of grocery shopping: standing in lines,” LG explained. “This shopping companion and trolley has a built-in bar code (条形码) scanner that rings you up(记入收款) as you shop. When you’re ready to check out, the automated payment service takes care of the bill,” the firm added.

What’s more, the self-driving cart help direct shoppers to a particular item they’re in search of. Users can also make requests through LG’s own app.

Along with its rolling robots, LG has also developed CLOi SuitBot, an AI-powered robotic suit pushing the leg movements of its wearer, letting them undertake tasks they normally wouldn’t be equipped to handle.

1.What does Paragraph 1 mainly want to tell?

A. self-driving shopping carts will be used in E-Mart soon.

B. LG is the largest supermarket.

C. The self-driving shopping carts are very popular.

D. LG’s rolling robots have arrived at the largest supermarket.

2.How many ways can the self-driving carts help customers when they are shopping?

A. one.    B. two.    C. three    D. four

3.What kind of robots has LG developed besides rolling robots?

A. self-driving shopping carts.    B. Serving Robots.

C. Porter Robots.    D. CLOi SuitBot (an AI-powered robotic suit).

4.What can we infer from the passage?

A. LG is only famous in South Korea.

B. LG is not good at developing robots.

C. The self-driving shopping carts are pushed by shoppers.

D. The self-driving shopping carts are a kind of smart shopping carts.