题目内容：

    It has been a year since I first saw UBTech’s Walker robot at CES 2019. I was blown away by its ability to perform many tasks.

A year later, it had come a long way, gaining much better motor skills and the ability to maintain balance. During a CES 2020 demo, UBTech showed how far Walker had come. The robot walked over to a table, picked up a bottle opener and used it to remove the cap from a bottle of soda. It picked up the bottle and a glass and poured the liquid in, without spilling. During the demo, Walker also performed a number of serious Yoga poses, including standing on one foot and leaning back.

UBTech said that the ability to pour drinks required visual servo technology using its cameras to judge the position of objects. The same methods allowed Walker to uncap a marker and draw a picture of a flower on a piece of paper at another point in the demo.

All of the betterment was made via software as UBTech hasn’t made any physical adjustments to the robot since we saw it last year. On the inside, the robot uses a combination of a few different operating systems on these internal PCs, including Ubuntu, ROS and Android. Its battery promises up to 2 hours battery life after a 2-hour charge time.

UBTech continues development on this pioneering robot, but doesn’t have public launch date. The company is targeting Walker toward the home, with an emphasis on helping seniors or just doing house cleaning. To make it stable enough to adapt to all these different conditions is a huge challenge. However, if development of Walker continues, this robot could eventually be a game-changer.

1.How did the author feel when first seeing the robot?

A.Amazed. B.Proud.

C.Awkward. D.Disappointed.

2.What is Paragraph 2 mainly about?

A.The demos of CES 2019. B.The improvements of the robot.

C.The robot’s motor ability. D.The robot’s ability to remain steady.

3.What enables the robot to draw pictures?

A.The cap of the marker. B.The ability to pour drinks.

C.The using of more cameras. D.The system of position judging.

4.What can we infer from the last paragraph?

A.The robot is stable enough to help the old.

B.The robot has been available to the public.

C.Our life could be greatly influenced by the robot.

D.The basic concept of robot making will be changed.