閱讀下面短文，從短文后所給的五個選項(xiàng)中選出能填入短文空白處的最佳選項(xiàng)， 使短文通順、連貫，意思完整。

Have you tried public bicycles? Public bicycles have recently become popular in big cities. But some people still question whether it really is easy to use the public bicycles. 1.

A group of students, at Shenzhen High School, Guangdong, are interested in it. 2. Through interviews and an online questionnaire (問卷）, they found the

biggest problem was that many bicycles were broken. 3. So, these students designed a smart storeroom that could store and protect bicycles.

They tried many designs, but finally made the smart circle storeroom. A storeroom can store 15 bicycles. Lei Mingcong, 12, the main designer, said he got the idea from his own life. “I found out that our public library has a smart storage machine. 4. Also, I noticed collective clothes

hangers (集合式晾衣架) are often found. They hang the most clothes.”

So how does the storeroom work? There is a smart mechanical device (機(jī)械裝置) at the center of it. 5. “It is all controlled by computer programs. Just like a‘smart home’, the device

could work by pressing a button ( 按 動 按 鈕 ),” said Wang Shunzhi, another designer of the storeroom.

A. It can catch the bicycles and hang them up.

B. It was the rain and sun that caused the problem.

C. It helps readers return books easily and quickly.

D. People also wonder what other problems there are.

E. They did a survey to find out the answers in August.

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