题目内容：

    One day your pocket might power your smartphone． Soon you may never have to worry about your smartphone running out of juice． Your clothing will simply power it back up for you． That's the word from scientists at China's Chongqing and Jinan Universities in a study just published in the journal ACS Nano．

Researchers have been hard at work during the last few years trying to create wearable energy， or clothes that can charge things． The assumption is simple． People today rely heavily upon devices such as smartphones and tablets． And they're looking for ways to recharge these devices on the go． So if you could design clothing fabric that could make use of solar power -one of the most widely available and inexhaustible renewable energy sources - you'd be able to charge your various devices with ease．

Scientists have had some past success creating energy-harvesting fibers． But there was always one problem when they tried to fashion these threads into self-powered smart clothes： The fibers they designed got damaged during the clothing manufacturing process， namely during the weaving and cutting． The Chongqing and Jinan University scientists say they've solved this problem because the energy-collecting and energy-storing threads they created are highly flexible - each individual thread is easily bendable， and not simply the fabric as a whole．

The team's sample textile can be fully charged to 1.2 volts in 17 seconds by exposure to sunlight - enough voltage that your future smart T-shirt or smart dress might be able to power small electronics． It's durable， too； their research showed there was no descent in the fabric after 60 days． But don't worry that this means the fabric is similar to rough cloth． The scientists note their textile can be fashioned into numerous different patterns， and tailored into any designed shape， without affecting performance．

1.What does the underlined phrase "running out of juice" in Paragraph 1 mean？ ______

A. Being lacking in energy． B. Wanting to have some juice．

C. Being picked out of a drink． D. Having some water running out．

2.Why could smart dress charge a phone？ ______

A. A solar cell is attached to the dress．

B. The fabric of the textile contains current．

C. The fabric of the textile is easily bendable．

D. The fabric of the textile could collect and store the solar energy．

3.What is the scientists' attitude towards the scientific technology？ ______

A. Optimistic． B. Pessimistic．

C. Neutral． D. Doubtful．

4.This passage is written to ______ ．

A. persuade readers to buy new clothes

B. inform readers of the ways to use their devices

C. introduce new wearable energy to readers

D. remind readers to wear smart clothes