题目内容：

The world’s first beer brewed (酿造) with the help of artificial intelligence (AI) is now on sale. Four beers have been created, with each recipe changed based on customer feedback (反馈) received by a program.

The system is hidden behind a Facebook Messenger robot, which takes feedback from customers and sends it onto human brewers who change recipes accordingly. Intelligent X, the company behind the beers, said the use of AI would help brewers receive and test customer feedback “more quickly than ever before”.

Codes printed on the bottles direct people towards the robot, which then asks a series of questions. This information is then interpreted by the program, which learns from customer feedback to ask better questions in the future.

The robot asks questions based on customer preference and flavour and answers are normally marks out of ten, yes or no and multiple choice. The AI uses a system known as reinforcement learning to learn from how it has acted and get better outcomes in the future. In this sense the AI is “rewarded” based on hard-coded biases that instruct it to please customers— those who like hoppier beers or stouts, for example.

This feedback is then accumulated to notice trends and inform the brewing process, with beers slowly changing over time.

“The AI is about putting all the customers in the same room as the brewer,” said Intelligent X co-founder Hew Leith. It would be extremely difficult and time-consuming for a human to collect this much data, Leith continued, but the AI can gather and interpret it with ease. The team behind the AI hope it could one day help them win a major beer brewing competition.

Intelligent X’s four beers have evolved eleven times so far based on initial feedback collected during trials over the last 12 months. The beers are currently being toured around in East London and are also being stocked by co-working space We Work. The four Al-brewed beers-golden, amber, pale and black—are available now from Ubrew for £ 4.50 each.

1.What can we know about the beer?

A. It is made by the customers themselves.

B. It is the first kind of beer in the world.

C. It can be changed with the feedback.

D. It can be bought from the website Facebook.

2.Who can change the beer’s recipes?

A. The human brewers.    B. The customers.    C. The system.    D. The Facebook.

3.What do we learn from the feedback?

A. It changes the recipes of the beer directly.

B. Customers can make it via the Internet.

C. Everyone can get any kind of beer according to it.

D. It is only based on customer preference.

4.What do Hew Leith’s words tell us?

A. The AI is ready to call on all the customers to get together.

B. It was once hard for us to get the feedback from the customers.

C. The AI can consume more time to collect the necessary data.

D. The team has already won many competitions about beer.